American Made Tree Safe Tree Swing Hanging Kit 5ft Length Military Grade Heavy-Duty Nylon Tree Safe USA DURABLE MATERIALS: This Multi Purpose Strap is made of Military Grade Nylon, Manufactured in the USA, and is able to withstand harsh winters and brutal summers without showing signs of wear. ENHANCED SAFETY FEATURES: Due to the high strength nylon we use in our tree swing kits, each strap holds up to 2000 pounds.