They are all built using 1000 denier UV resistant "double-thick" polyamide reinforced Hypolon & Neoprene. Each sled is hand made using glue bonded overlapping seams. A double layer padded floor on the bottom. Molded strong handles and Non return valves are fitted; perfect for commercial recreation, Ganesh Manufacturing has sold Thousands of these durable Slide Rafts to Water parks in India & Asian Countries.