Osprey's Aircover is a black cover designed to protect your backpack, featuring a stowable design. (No worries about straps getting caught when checking your pack on a plane) It opens and closes with a zipper, protecting your pack during check-in. Zipper is lockable. Stowable in the pack. Features a drawcord to adjust the fit. Can also be used as a rain cover in conjunction with pack straps. Capacity: M = 90 liters (Compatible with 40-60 liter packs) External dimensions: M = 74 x 44 x 36 cm (height x width x depth) Weight: M = 339g - Brand: Osprey - Model Name: Aircover M size - Color: Black - Features: Stowable design Purchased last year and used once. Please understand that this is a used item. Thank you for looking.