The adjustable straps is durable enough. About the length of straps, The max length is about 39.5 inches , and the min length is about 31.5 inches. Package Include: 2 pcs straps (1 pair)
Length Adjustable.
The End Parts (connecting accordion samll straps ) is Genuine Leather.
Other Parts is PU Leather.
Front Side of This Strap is Black Color, Reverse Side is White.