NANUK New Neoprene Adjustable Shoulder Strap with Closed AirCell Cushioning for Cases and Messenger Bags and Briefcases. MADE IN CANADA. Aircell technology uses multiple sealed air chambers along the surface of the strap to absorb and dampen the load as you walk. Typically Clamps right to your case or bag without any further modifications . Top grade materials will provide you with years of use and comfort. Your bag or case will always feel safe and secure, no more worries of slipping or unlatching.