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. 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.