The zeiss air cell carrying strap is an adjustable convenient carrying strap the quick release fasteners make it quick and easy to attach and detach the carrying strap while the elastic neoprene with air cell padding construction ensures maximum comfort the zeiss air cell carrying strap has been designed to fit all zeiss binoculars with a lens diameter 30 mm or larger but can also be used with most or full size binoculars from or manufacturers and even and slr cameras