Steel chains in the slice-resistant 31" straps (not adjustable). Horizontal Barrier Pocket (2.5" tall) on the bottom is handy for clean socks, snacks, etc. and protects the main compartment (9.5" tall) from slash and grab theft. A zipper security leash in the back seam secures the outside zippers. Supersize front zipper pocket with oversized lining for bulky objects with a double ended leash for keys and included DayMaker wallet. This model includes an organizer (6 card slots, 3 drop in pockets, a large zipper pocket and a pen slot). The large outer open pocket has a smart phone drop-in pocket. There is an open pocket on each end (one with velcro flap) for umbrella, sunglasses or .5L water bottle (water bottle will fit if the side of the bag has room to expand inward). Inside is a super-sized, super secure pleated zipper pocket that is as tall and wide as the bag and two handy pleated drop in pockets, 1 large and 1 small. Being organized is a key to being safe - the less you are searching the more you are aware of your surroundings. Dimensions: 12" x 8.5" x 5" , Weight: 25 oz. Material: Top grain cowhide, polyester lining - Any leather cleaner followed with conditioner is safe to use. , Material: Polyester microfiber, polyester lining , easy care machine washable, gentle cycle, mild soap, cold water, and tumble air dry no heat. OK to use fabric protectant.