AIRE Tributary Tomcat Tandem Inflatable Kayak AIREcell System, 30 ounce/500 denier outer PVC tubes, 32 ounce/1000 denier outer PVC floor Airtight 20-gauge inner vinyl bladders, double-zipper access, welded seam construction 3 air chambers with Summit II valves, 2 adjustable inflatable seats Self-bailing mesh drainage system, 18 sets of cargo loops, bow/stern carry handles & d-rings 1-year manufacturer warranty against defects, repair kit included