It snaps closed with a metallic d20 rivet. But you can open that snap up, and it make it an isosceles trapezium. Removable double handles & shoulder strap (20" drop).Magnetic snap closure at top Organizer built in to lining (9 card slots, 2 open pouches, 2 zip pouches, keyholder) Metal feet on the bottom for durability,polyurethane exterior;polyester lining.Dimensions: 17" wide x 17" tall x 4 3/4" thick (when folded); 7"-24" wide x 17" tall x 4 3/4" thick (when open) Weight: 2 1/2 lbs. PriceFirm