2 - in - 1 Bicycle Bag The multifunctional 2 - in - 1 triangular bag can be used as a frame bag, top - tube bag, or saddle bag. The 2.5 - liter capacity is suitable for daily bicycle use. You can store tools, mobile phones, keys, bicycle pumps, and other items. This bicycle bag is ergonomically shaped, and the bicycle frame bag is very narrow, so it won't rub against your legs while riding. Large Capacity With a total volume of approximately 2.5 liters for daily use. Our bicycle bag is large enough to hold tools, phones, keys, bicycle pumps, etc. Inner Pocket Design The inner mesh pockets and outer pockets of our bike bags can help you better organize and store items. Easy Installation With the detachable Velcro fasteners, this frame bag is easy to disassemble and can be easily taken with you when leaving the bike. Water - Repellent The ROCKBROS bicycle bag is made of high - quality polyester material. It is wear - resistant, durable, and not easily deformed. Product Details ROCKBROS Bike Bag Set Brand: ROCKBROS Material: Polyester Capacity: 2.5 L Size: Small: approx. 27.5 * 4.8 * 8.5 cm / Large: approx. 29 * 4.8 * 13 cm Features: Water - repellent, detachable design Multifunctional Bicycle Bag Set Our bike bag can be used as a single frame bag or as 2 separate bicycle bags (frame bag, top - tube bag, or saddle bag). It can be mounted anywhere on the frame or under the bike seat.