H2O Audio TRI 2 Multi-Sport Waterproof Bone Conduction Headphones are a breakthrough in audio technology, offering enhanced sound quality and an improved ergonomic design. Engineered for endurance athletes, they deliver a superior listening experience, whether you’re training on land or in water. New SOUND Open Ear Experience: Our latest bone conduction speakers are slimmer (by 5mm vs. TRI headphones) and use enhanced speakers that provide an amazing sound in and out of water - with full situational awareness. Multi-Sport Design: Designed for swimming, biking, running, paddling, surfing, snowboarding. Your Sport - Your Music! 100% Waterproof: H2O Audio waterproof technology allows headphones to withstand submersion to 12'/3.