The NRS Split Kayak Flotation set's long and narrow flotation bags fit on either side of a kayak's center support pillar. The full set includes two bow bags and two stern bags. Bow bags fit forward of the foot area of most kayaks longer than 8'. With 10-gauge Urethane fabric these bags won't leak or delaminate! To determine the correct size of float bag for your boat, measure the inside compartment and order a bag that is slightly larger in dimensions to fill the space in your boat completely.