(1)ANTI-SPLASH TOPThis design can avoid the splashing of water,Website: , provide an extremely efficient barrier against water entering the top of the snorkel.(2)PURGE VALVE SYSTEMVersions with the lower purge valve system ensure quick and effective tube purging.(3)MULTI-FOUNTIONED SNORKEL KEEPERA must for all snorkelers and divers to have: Fast clip attachment to mask strap; easy clip release; quick tube release; vertical adjustments.Material:Mouth piece :PVC or SiliconeTube: PVCPacking:Standard packing: poly bag for each piece.Other packings with different prices for choosing,such as PVC bag, Blister card,mesh,polybag with header.