Aircell System, 30 ounce/500 denier outer PVC tubes, 32 ounce/1000 denier outer PVC floor Airtight 20-gauge inner vinyl bladders w/ double-zipper access, double top-stitched seams 3 air chambers with Summit II valves, adjustable inflatable seat mesh drainage system, 12 sets of cargo loops, bow/stern carry handles AIRE Tributary Tomcat Solo Inflatable Kayak - The Tributary Tomcat Solo inflatable kayak from AIRE is an entry-level boat built with a perfect blend of design and price. The upturned bow and stern deflect waves, making the Tomcat easy to maneuver when the action picks up. A heavy-duty PVC outer shell provides superior durability, and airtight internal bladders provide an extra measure of strength and safety. The adjustable inflatable backrest provides great support. With a roomy interior and multiple tie-down loops, there's plenty of room for gear on overnight trips. The AIRE Tributary Tomcat Solo inflatable kayak is a fun and comfortable choice for paddlers who want to try the sport of whitewater kayaking.