A serious whitewater kayak, the Explorer 381x Inflatable Kayak can also be used for long flatwater paddles and camping trips. At 12'6", this kayak has room for two adults and a week or more of gear. Built of the same 1000 denier fabric as our Sport Boats, this kayak can be inflated to 3.2 PSI. This, and hefty 11 " diameter tubes give the SE 381x the structure needed to cut through rough, class 4 whitewater.