Amazon.com: The Sak Ventura Backpack in Leather, Adjustable 。Excellent pre owned condition. The Sak - Black Leather Ventura Convertible Backpack II. 13in L x 3in W x 12in H; Drop: up to 21 inches; Weight: 1.81 lb. Exterior: Leather; trim: recycled polyurethane Interior: Repreve lining Antique silver tone hardware Zipper and magnetic snap on flap Front zipper pocket Interior contains back wall slip pocket, zipper pocket and two front wall multi-functional pockets Adjustable convertible strap, can be worn as a backpack or crossbody The Sak’s leather products support responsible manufacturing via Leather Working Group, REPREVE lining made from recycled materials including plastic bottles