The Friendly Swede 2 Pack Swim Goggles for Adults with Interchangeable Nose Pieces and Protective Cases, Black and Clear ANTI FOG PROTECTION: The lens has anti-fog treatment, is scratch resistant and PVC and latex free. The lens is not mirrored, the black goggles are slightly tinted. If the anti-fog treatment starts wearing off, add more or use one of the remedies recommended below CLEVER DESIGN: Wide angle lens for improved visibility, makes goggles perfect for both indoor and outdoor use. Easy to adjust dual silicone straps for a comfortable and tight fit. Silicone gasket creates a secure and watertight seal INTERCHANGEABLE NOSE PIECES: 3 sizes (S, M, L) makes goggles a perfect fit for different head sizes and shapes. Great for men, women and youths (NOT for kids) GOGGLES CASE: The protective case makes storing your goggles easy and will extend their lifetime LIFETIME WARRANTY: This product is covered by The Friendly Swede's Lifetime Warranty Wet inside of goggles before use and wash with fresh water after use. Do not rub or scratch inside of goggles. Anti-fog treatment will wear off over time. To increase longevity of goggles, use anti-fog solution (available from specialist retailers). Saliva, toothpaste and baby shampoo gently applied to lenses can all be used as temporary measures but are not recommended as a long term solution. Check lenses for scratches and cracks carefully before use. Very occasionally, silicone straps may cause skin irritation. Consult with your doctor if this occurs. Do not look at directly at the sun when using goggles. Avoid storing goggles with silicone swim caps as colour transfer may occur.