Cordura Nylon. Divided style has separated pockets for magazines, with molded inserts and internal tensioning devices. Internal tensioning device retains magazine even when flap is unsnapped. Back of all cases padded for comfort. Padded, reinforced flaps protect magazine; design has nylon stiffener tab for easier opening. Double case with rounded flaps with snap closure; no-glare, no-wear snaps. Double cases have a molded insert with increased space between the magazines for better access; insert is rigid on sides, front and bottom. Double cases have Velcro-adjustable flaps and molded belt loop for horizontal or vertical carry on belts up to 2 1/4". Double row magazines fit most magazines except Glock and .45 and 10mm.