HOMETEK Swimming Goggles No Leaking Anti Fog UV Protection Triathlon with Free Protection Case Silicone strap and eyecup with anticorrosion and anti-oxidation. Eco-friendly, Non-toxic, odourless, stable chemical property. Electric insulation material with excellent water resistance. Soft feeling, comfortable, durable skid-proof design. Adjustable straps and nose piece help create a COMFORTABLE FIT AND WATERTIGHT SEAL.