Welded seams - no glue to harden or breakdown. Heavy duty spring actuated valve with quarter turn lock for easy inflation and deflation. Over 50% more abrasion resistant and twice the tear resistance than the best-selling competitors brand. 30% heavier material and 15% higher tensile strength than the competitions brand. 2" Tubular nylon webbing is used on the end caps, making the straps extremely strong. 5-Year warranty. Size 18" ? 29" Color Black