MASK Polycarbonate lensPLYFLEX skirt & strap: Durability and comfortQuick adjust strap: pull strap to tighten and push button to loosenFlexible hinge for increased comfortSNORKELWhistle Top: Built-in whistle for safety alertSplash Top: keeps splashed water from easily entering tubePurge valve: Easily clear any water from snorkelQuick Release Clip: easily attach and remove dive maskSmall sized mouthpieceCROSSFINSlide locking system – easily switches from a mono fin to dual finsQuick release multi size strap – easily adjust to any size footFlex system – allows the blade to flex for more powerFlow channels: easily to kick underwear to reduce fatigueFlexible foot pocket: comfortably adjust to feetDrain hole: allows water to flow through foot pocketNon-slip tread: bottom pattern helps prevent slipping