Proto Switch Entry Level (EL) Mask -Deluxe woven goggle strap for comfort and durability. -Tiger tooth strap buckles will allow you to adjust your strap for a custon fit. Just set it and forget it. -The multi-ported ear piece provides unrestricted audible transfer to take place without sacrficing any ear protection. -Our incredibly simple 1/4-turn buckle (patent pending) makes the hassle of changing lenses a thing of the past. Simply turn the locking tabs to the right to unlock your lens frame. Pop out your old lens, drop in a new one, place the frame over the lens into position, and turn your tabs back again to lock it in. -Multi-directional venting drastically reduces re-ventilated fogging. The venting also assists in keeping you cool and breathing easy. -The first tirodial lens in the world of paintball - all the clarity jet pilots have. All Switch lenses have perfect optical clarity, setting a new standard in visual performance. -Self-venting, low profile