"Because it matters" - the bestseller from the Competition series: Boston Mirror, ergonomically shaped, highly adjustable, and cool mirrored. The extremely flat profile of the Boston swimming goggles results in very low water resistance. The double, highly elastic headband, interchangeable nose bridges, and small eye cups with silicone lamellar seals ensure a perfect fit. The polycarbonate lenses with UV protection 50+ are tinted and feature an anti-fog function. The mirrored lenses provide a clear view in the water and a sporty look. Lenses: polycarbonate, mirrored, UV protection, anti-fog. Sealing/frame: silicone (lamella)/polycarbonate. Headband: silicone (double band), adjustment clip. Special features: additionally includes two nose bridges in different sizes, storage box to protect the goggles, certified according to BS5883:1996.