What’s UV?
UV stands for ultraviolet. It refers to a specific range of wavelengths within the electromagnetic spectrum. Although UV rays are invisible to the human eye, they are very much present. There are three main types of ultraviolet radiation - UVA, UVB, and UVC - each with different wavelengths and unique properties.UVA, UVB, and UVC – What Do They Do, and Where Can You Find Them?
Most people have heard of UVA and UVB, but what about UVC - or the difference between UVA1 and UVA2? Let's start with the shortest wavelengths. UVC (100–280 nm) is naturally present in sunlight, but it is almost completely absorbed by the Earth's ozone layer, so it doesn't normally reach the Earth's surface. UVC radiation is highly effective at killing bacteria, viruses, and other microorganisms, which is why it is widely used in germicidal lamps. You may wonder why these lamps appear to emit visible light if UVC itself is invisible. The blue or purple glow doesn't come from the UVC radiation itself - it comes from materials inside the lamp that emit visible light. This glow simply indicates that the lamp is operating. Despite the visible light, you should never remain in a room while an unshielded UVC lamp is on, as direct exposure to UVC radiation can damage your skin and eyes. This technology is commonly used in laboratories, hospitals, and other environments where disinfection is essential. Next is UVB (280–315 nm). A simple way to remember its effects is that the "B" stands for "Burn." UVB is primarily responsible for sunburn because it affects the epidermis, the outermost layer of the skin. However, UVB also plays an important role in the production of vitamin D, which is essential for maintaining healthy bones and supporting a properly functioning immune system. A vitamin D deficiency can contribute to conditions such as osteoporosis. Finally, there's UVA (315–400 nm). The "A" stands for "Aging" because UVA is the primary cause of premature skin aging. Unlike UVB, UVA penetrates much deeper into the skin, reaching both the epidermis and the dermis. Another important difference is that UVA can pass through glass, meaning you can still be exposed to it indoors or while driving. Both UVA and UVB can damage skin cells. Prolonged exposure increases the risk of skin cancer, accelerates premature skin aging, and contributes to oxidative stress. That's why wearing sunscreen every day - even when you're indoors near windows or driving - is an important part of protecting your skin.Should You Wear Sunscreen at Home?
We already know that UVA rays can penetrate glass, but does that mean you should wear sunscreen indoors? The answer is yes - especially if you spend a lot of time near windows. If you work by a window or sit in direct sunlight for extended periods, applying sunscreen in the morning is a good idea. You can also reduce UV exposure by installing UV-protective window film or simply keeping your blinds or curtains closed during the sunniest hours of the day. Ultimately, the decision is up to you and your daily routine. Personally, I keep my blinds closed throughout the morning because my windows face east. By the afternoon, the direct sunlight has mostly disappeared. Since I apply sunscreen every morning and reapply it throughout the day, I already have protection in place by the time the afternoon sun reaches my windows.What's the Difference Between Mineral and Chemical Sunscreens?
There are two main ways to classify sunscreens: mineral (inorganic) and chemical (organic). Mineral sunscreens use inorganic UV filters - most commonly zinc oxide and titanium dioxide. These ingredients provide broad-spectrum protection, especially when used together. One drawback is that they can leave a white cast, particularly on deeper skin tones, although many modern formulations have significantly reduced this effect. Chemical sunscreens use organic, carbon-based UV filters. These filters are typically lightweight, spread easily across the skin, and generally don't leave a white cast. Modern formulations often combine multiple UV filters to provide broad-spectrum protection while maintaining an elegant, comfortable finish. Neither type is inherently better than the other. The best sunscreen is the one you'll apply generously, reapply as needed, and wear consistently every day. For some people - especially those with post-inflammatory hyperpigmentation (PIH) or melasma - tinted mineral sunscreens containing iron oxides may provide additional protection against visible light, which can contribute to hyperpigmentation. In these cases, a tinted sunscreen with iron oxides may offer an extra layer of protection beyond UV radiation alone.Sunscreen Reapplication
Most sunscreen brands recommend reapplying sunscreen every two to three hours. The reason is simple: throughout the day, sunscreen gradually wears off. We sweat, touch our faces, wear clothing that rubs against our skin, and wipe our skin with towels or tissues. All of these everyday activities can remove part of the protective layer, reducing its effectiveness. It's also important to remember that everyone responds differently to UV exposure. One person's skin may start to burn after just five minutes in the sun without protection, while someone else may be able to stay outside much longer before experiencing the same effect. Factors such as skin tone, UV index, time of day, altitude, and individual sensitivity all influence how quickly UV damage can occur. As a general rule, reapplying sunscreen every two hours - or every two to three hours, depending on your level of sun exposure - helps maintain consistent protection throughout the day. If you're swimming, sweating heavily, or drying your skin with a towel, you should reapply even sooner, following the instructions on your sunscreen's label.
Japanese vs. Korean Sunscreens: Which Is Better?
I believe both Japan and Korea produce excellent sunscreens, but neither country gets every formula right. There are outstanding products from both, as well as some I wouldn't personally recommend. Skincare is highly individual, and a sunscreen that works perfectly for one person may not suit someone else. One difference I've noticed is that many Japanese sunscreens contain a higher amount of alcohol. That's not necessarily a bad thing - alcohol can help create lightweight, fast-drying formulas with elegant finishes. However, these sunscreens often feel drier on the skin than many Korean alternatives, which may not be ideal for people with dry or sensitive skin. Japanese brands are also known for their innovations. For example, Athlizm IR introduced impressive technology designed to maintain sunscreen performance under harsh conditions. While the concept sounded excellent on paper, the formula simply didn't work well for my skin. Korean sunscreens, on the other hand, often place a stronger emphasis on the skincare experience. In addition to providing UV protection, many formulas include moisturizing, soothing, or barrier-supporting ingredients, making sunscreen feel like an extension of a daily skincare routine rather than just a protective product. Ultimately, neither Japanese nor Korean sunscreens are inherently better. The best choice depends on your skin type, preferences, and the finish you're looking for. If you prefer lightweight, water-resistant formulas, you may enjoy Japanese sunscreens. If you're looking for a more hydrating, skincare-focused formula, Korean sunscreens may be a better fit.What do you mean by "Western users"?
The brands that are popular in Western markets and marketed as K-beauty are often created by Korean companies, but that doesn't necessarily mean they're designed for the Korean market. Some products aren't available in Korea at all, while others are sold there but aren't nearly as popular as they are in the United States or Europe. Conversely, not every Korean brand chooses to sell its products internationally. Some time ago, Odile Monod - a beauty marketer and senior art director based in Korea - shared a ranking of the most popular sunscreen brands in Korea, compiled by the Korea Corporate Reputation Research Institute. The list includes well-known Korean brands such as Dr.G, HERA, Cell Fusion C, and AHC (which also happens to be my favorite eye cream brand). It also features international brands like Lancôme, Kiehl's, and Nivea, which belong to European companies, as well as Japanese brands such as Anessa. I've previously reviewed a Nivea sunscreen and discussed the differences between Japanese and European sunscreen formulations. Interestingly, when you look at Nivea's Korean website, the sunscreens sold in Korea are the same as those available in Europe. There are also brands such as Shingmulnara or Elroel. Although Elroel has recently become more widely available - even in Poland - it still doesn't have the same level of international recognition as brands like MISSHA, SKIN1004, or Beauty of Joseon. SKIN1004 has a flagship store in Seoul, while Beauty of Joseon first became widely popular outside Korea before eventually becoming available at Olive Young. Other brands, such as Round Lab, are highly popular within Korea through platforms like Hwahae while also enjoying strong international recognition. The main point is that not every product promoted as "popular in Korea" is actually a bestseller among Korean consumers. Does that make those products bad? Not at all. It simply means that consumer preferences differ from market to market. For example, tone-up sunscreens and tone-up creams are particularly popular in East Asia but tend to appeal to a much smaller audience in the United States and Europe. That's why the sunscreens that rank among the top sellers internationally aren't necessarily the same ones that are most popular in Korea.Meet the Brand: House Of Hur
House of Hur is a Korean skincare brand founded in 2022, it's co-created by Sunny Dahye. It’s a brand that celebrates individuality. The name House of Hur represents a safe space for HURFRIENDS, the community surrounding the brand. “Hur” combines the founder’s family name with the word “Her,” which symbolizes femininity. The brand focuses on sustainability, ethical practices, eco-friendly ingredients, and cruelty-free products.
House Of Hur Weightless Sun Fluid
House of Hur Weightless Sun Fluid is a sunscreen that contains a high concentration of Jeju Yuja Extract (26%) and 19% pure New Zealand Manuka Honey Extract. The product has a lightweight, lotion-like texture that is effortlessly absorbed into the skin, leaving a natural, refreshed finish without a white cast.House Of Hur Weightless Sun Fluid - Packaging
I ordered a mini version of the House of Hur Weightless Sun Fluid, so the tube I received is slightly different from the full-sized product. The mini contains only 10 ml of product, and the packaging is more rounded than the regular version. The full-sized bottle contains 50 ml. I’m still surprised that such a small product has such a nicely shaped applicator.
House Of Hur Weightless Sun Fluid - Texture & Scent
House Of Hur Weightless Sun Fluid - Vegetarian/Vegan-friendly & other claims
House of Hur is a cruelty-free brand, so House of Hur Weightless Sun Fluid is also cruelty-free. However, this sunscreen contains Honey Extract, which means it is not suitable for vegans.
House Of Hur Weightless Sun Fluid - UV Protection
House Of Hur Weightless Sun Fluid - Water-resistance
House Of Hur Weightless Sun Fluid - Ingredients
Citrus Junos Fruit Extract, Water, Honey Extract, Dibutyl Adipate, Ethylhexyl Triazone, Terephthalylidene Dicamphor Sulfonic Acid, Silica, Butylene Glycol, Methylpropanediol, Tromethamine, Polyglyceryl-3 Distearate, 1,2-Hexanediol, Caprylyl Methicone, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Polysilicone-15, Ammonium Acryloyldimethyltaurate/VP Copolymer, Potassium Cetyl Phosphate, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Glyceryl Stearate, Pentylene Glycol, Polyacrylate Crosspolymer-6, Hydroxyacetophenone, Polyether-1, Glyceryl Stearate Citrate, Ethylhexylglycerin, Disodium EDTA
Honey Extract is a natural humectant that helps attract and retain moisture in the skin, leaving it softer and more hydrated. It also has antioxidant and antibacterial properties, which may help support the skin barrier and soothe irritated skin. Dibutyl Adipate is an oily emollient that is soluble in oils. It helps soften and smooth the skin while forming a lightweight film on the skin’s surface, which can help reduce moisture loss. It is commonly used in sunscreens as a solvent for UV filters and can also contribute to a lightweight, non-greasy texture. Ethylhexyl Triazone, also known as Uvinul T 150, is a highly effective organic UV filter commonly used in modern sunscreens. It provides broad UVB protection (280–320 nm), with a peak absorption at approximately 314 nm. It is one of the most powerful UVB filters available, offering high protection at relatively low concentrations. Terephthalylidene Dicamphor Sulfonic Acid is a long name, which is why you may know this ingredient better as Mexoryl SX or Ecamsule. Mexoryl SX is L’Oréal’s trade name for this sunscreen filter, while Ecamsule is its INCI/common chemical name used when referring to products from other brands. It protects the skin from UVA radiation (approximately 315 - 400 nm), with peak absorption around 345 nm. It is a highly photostable chemical sunscreen filter that provides broad UVA protection. Silica is a mineral-derived ingredient widely used in both makeup and skincare. It can absorb excess sebum, helping to reduce shine and create a more matte finish. It can also be used as a thickening or texture-modifying agent in cosmetic formulations. Butylene Glycol is a multifunctional ingredient commonly used in skincare and haircare products. It acts as a solvent and humectant, helping to dissolve ingredients while attracting moisture to the skin and hair. It can also enhance the penetration of active ingredients, improve a product's texture, and prevent formulations from drying out. Methylpropanediol is a synthetic solvent that helps dissolve other ingredients and improve the texture and spreadability of cosmetic formulations. It also has antimicrobial properties, which can support the preservation system of a product. Tromethamine is a synthetic pH adjuster and buffering agent. It helps neutralize acidic ingredients and maintain the stability of cosmetic formulations at an optimal pH level. Polyglyceryl-3 Distearate is an emulsifier that helps blend oil- and water-based ingredients and keeps the formula stable. It can also have emollient properties, helping to soften and smooth the skin. 1,2-Hexanediol is a synthetic solvent and preservative booster. It helps protect products from microorganisms by enhancing the effectiveness of other preservatives. It also has humectant properties, helping to keep the skin hydrated, and is generally well tolerated by the skin. Caprylyl Methicone is an alkyl methyl silicone and an emollient. It has a lightweight, waxy texture that makes products easier to apply and spread evenly. It works well with natural ingredients and pigments. As a volatile silicone, it evaporates shortly after application, leaving the skin with a smooth, non-greasy feel. Diethylamino Hydroxybenzoyl Hexyl Benzoate, also known as Uvinul A Plus, is a highly photostable organic UVA filter commonly used in modern sunscreens. It protects the skin against UVA radiation (320–400 nm), with peak absorption at approximately 354 nm. Polysilicone-15 might sound like an ordinary ingredient, but you may know it better as Parsol SLX. And yes, it is a UV filter. It protects the skin primarily from UVB radiation (approximately 290 - 320 nm), with peak absorption around 310 nm. It is often used alongside Avobenzone and can help improve its photostability in sunscreen formulations. Polysilicone-15 is also commonly used in hair care products, where it can help protect hair from UV-related damage.
Ammonium Acryloyldimethyltaurate/VP Copolymer is a synthetic polymer primarily used as a thickening and stabilizing agent. It helps create a smooth, pleasant texture and improves the consistency of cosmetic formulations. Potassium Cetyl Phosphate is a surfactant and emulsifier commonly used in oil-in-water formulations. It helps stabilize the formula and is frequently found in sunscreen products, where it can improve water resistance and support the formation of a more durable, even sunscreen film on the skin. Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine is a difficult name to remember, which is why it is more commonly known as Tinosorb S. It is a newer-generation UV filter and is considered one of the most effective and photostable sunscreen ingredients available. Tinosorb S is an organic (chemical) UV filter that provides broad-spectrum protection against both UVA (315–400 nm) and UVB (280–315 nm) rays. It has a high absorption capacity across a wide range of the UV spectrum, making it highly effective at protecting the skin from UV-induced damage. One of its greatest advantages is its excellent photostability. Unlike some older UV filters, Tinosorb S remains stable when exposed to sunlight. It can also help stabilize other UV filters in a sunscreen formula, reducing their photodegradation and improving the overall stability and effectiveness of the product. Glyceryl Stearate is an emollient with emulsifying properties. It helps soften and smooth the skin while also helping to stabilize cosmetic formulations. Pentylene Glycol is a multifunctional ingredient commonly used as a solvent and stabilizer in skincare formulations. It also has moisturizing properties, helping the skin retain water and improving the overall feel and performance of products. Polyacrylate Crosspolymer-6 is a thickening agent that helps create elegant, lightweight, and non-sticky formulas. Hydroxyacetophenone is an antioxidant that also acts as a preservative booster, helping improve the effectiveness of the preservative system and enhance the formula's stability.
Polyether-1 is a thickening and viscosity-controlling agent. It helps improve the texture and consistency of cosmetic formulas and can also contribute to their stability. Glyceryl Stearate Citrate is an oil-in-water (O/W) emulsifier that helps blend oil and water-based ingredients and keep the formula stable. Ethylhexylglycerin is a multifunctional ingredient used as a preservative and preservative booster in cosmetic formulations. It has mild moisturizing and antimicrobial properties, helping to keep products stable while supporting the effectiveness of other preservatives. Disodium EDTA is a chelating agent that neutralizes metal ions, preventing them from destabilizing the formula or accelerating oxidation. This helps maintain the product's stability, effectiveness, and shelf life.
How to use House Of Hur Weightless Sun Fluid?
House Of Hur Weightless Sun Fluid should be applied as the final step of your morning skincare routine, before makeup. I recommend using the two-finger method - squeeze two strips of sunscreen along your index and middle fingers - to ensure adequate coverage for the face and neck. Reapply every 2 - 3 hours, especially if you are outdoors, sweating, or exposed to water, as sunscreen can gradually wear off and migrate on the skin.
How does House Of Hur Weightless Sun Fluid work?
House Of Hur Weightless Sun Fluid - Skin Compability
House Of Hur Weightless Sun Fluid - Pros & Cons
+ Great for oily and combination skin, especially skin that leans oily
+ Matte, natural finish without looking visibly dry or powdery
+ No white cast
+ Fragrance-free and contains no alcohol or essential oils.
+ Doesn’t sting the eyes
+ Works well under makeup
+ Feels comfortable on the skin without being heavy or greasy
+ Cruelty-free.
Cons
- May feel too drying for dry or dehydrated skin
- Some users experience makeup pilling, particularly those with dry or dehydrated skin
- Contains Honey Extract, so it’s not vegan.
House Of Hur Weightless Sun Fluid - Alternatives
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