10-gauge urethane material that won't leak or delaminate 38" inflation tube length, Sold individually Small Dimension inflated: 31"L x 10"D x 22"W, 3"W at tip Medium Dimension inflated: 37"L x 11"D x 19"W, 3"W at tip Large Dimension inflated: 47"L x 14"D x 24"W, 3"W at tip NRS Standard Kayak Flotation - The NRS Standard Kayak Float Bag is patterned so that a single bag fills the entire stern compartment of a kayak designed without a center pillar. This float bag is available in three sizes to fit everything from the smallest rodeo kayak to the largest recreational boat.