Black; 12" wide/diameter x 18" tall (21" tall when expanded); Cubic Inches: 2,036 (2,375 expanded); Liters: 33 (39 expanded); UV-rated weather-resistant 1200 denier textile material with removable rain cover; Quick-mount sissy bar strap design gets you on the road in record time; External adjustable bungee storage system for coat, bedroll or other items; Low-profile carrying handle and removable shoulder strap for carrying convenience off the bike; Separate bottom compartment for quick access to included rain cover and other items; Convenient external bottle pocket with MOLLE modular attachment; Easy-access quick-stash pockets for smaller items; Multiple D-Rings for easy and secure mounting options if using without sissy bar or backrest