The optech usa super classic strap bino 38 nature is designed to carry a binoculars up to 15 lbs it is a tailored 20 wide neoprene strap that uses a comfort stretch binding with an internal control stretch system for added support there is a non skid surface that wont slip on shoulder this strap is made in the usa tailored 20 wide neoprene strap uses comfort stretch binding with an internal control stretch system for added support non skid surface wont slip