This boat is made with our standard 1.2mm / 1,100 D PVC with a high density polyester fabric. It has excellent resistance to tearing, tension, abrasion and puncture. The heavy-duty outer PVC layer helps protect against UV rays, ozone and abrasion while the inner layers provide additional strength and support. All around durable 4" rubber strake provides protection where most wear occur when docking or tying off to another boat. The extra layers of fabric at the bottom of the tubes and rubber-strake protector along the bottom provide extra protection from sharp rocks and abrasive sand.