Keep your fitness goals clearly in sight with the Nike Swim Expanse Swim Mask Goggle. The pool goggles are made from an ultra-soft liquid silicone with flex points that help to keep water out while allowing for natural facial movement. A wide head strap featuring plenty of stretch helps to ensure a comfortable fit. Durable and flexible dual-density construction helps the swim goggles stand up to the rigors of regular use. ULTRA-SOFT liquid silicone for optimal comfort;FLEX POINTS allow natural face movement while keeping a watertight seal;WIDE, stretchy head strap for a smooth, comfortable fit;FLEXIBLE, durable dual-density construction