The Boston valve is a 2-way screw-in valve that keeps the air in the chamber. A non-return cap prevents air from escaping as soon as the pump hose is removed. To bleed, simply open the whole valve, to inflate only the cap. Inflating and venting is very simple and fast, as the air flow is always under control. Multifunctional carrying handle and/or paddle holder to relax hands. The Sevylor Seatography helps you to optimally align your seat to find the most comfortable position for your seat. Extremely robust and resistant Sevy-Strong Tarpaulin with large surface area against possible air loss. Wide shape, very good stability. Valves used: Boston valves and Mini-Boston valves. Drain valve, spray covers at bow and stern, 2 comfortable seats with backrest and 15 cm seat height, 2 adjustable, removable seats - just decide whether you want to travel with 2 or 1 person. New, pre-shaped handles on the sides, which also act as paddle holders. Improved carrying bag for easy transport and storage.