OGIO Tail Bag 2.0The OGIO Tail Bag 2.0 has a universal web mount system for secure connection to your bike. The main compartment is expandable, and there are 2 exterior pockets for easy access. When the rain starts, the included rain cover keeps your items dry. The OGIO Tail Bag is a great choice when you want to put your items behind you but not leave them behind.Features: 1000D Poly, 400D Nylon and textured neoprene construction Deluxe main compartment with 30 Litersof expansion volume Sleek streamlined air flow surface design Top organizer pocket Dual molded side accessory pockets Integrated hidden rain hood Reinforced textured neoprene non-slip pad for paint protection Universal web mounting system for secure attachment Easy grab reinforced handle Specifications: Capacity: 21 Liters (30L expanded) Dimensions:7" H x 13" W x 14" D (10" H expanded) Weight: 2.2 lbs Note: On-bike image pictures older version, for size reference only.