Our Lazy Loungers are made from high-quality ripstop polyester. Which means you can safely and confidently use them on a wide array of surfaces such as concrete, sand, gravel, dirt, grass, water, etc. However, although extremely durable, they aren’t indestructible. DO NOT set them on or drag them over anything sharp, jump on or fall into them, pull them behind a boat, use them to raft down a river or expose them to anything hot…like fire!