25L capacity for ample storage during cycling adventures keeps your essentials within reach and organized, making rides more comfortable and convenient suitable for tools, spare clothing, snacks, rain gear, and other cycling essentials Waterproof material for reliable protection made of sturdy cathotic fabric with waterproof properties to keep contents dry in wet conditions designed to shield your items from rain, splashes, and road spray Instant support and secure mounting easily attaches to the back of your bike with six sturdy straps includes an inner berry board for a strong, stable structure that prevents collapse during rides Quality construction and safety features large reflective strips for improved visibility after dark reinforced seams to enhance durability and longevity in regular cycling use 23 practical use scenarios Daily commuting and errands: carry a change of clothes, lunch, tools, and small groceries without compromising balance or ride comfort Weekend rides and short tours: store rain gear, hydration, snacks, and a light layer for varying weather conditions Family rides or longer excursions: pack firstaid supplies, maps or devices, and spare parts while keeping everything dry and secure Designed for compatibility, size, and performance 25L capacity balances ample storage with maintaining a low, stable center of gravity made for easy, secure attachment to the rear of most bikes via six straps and the inner berry board built to endure frequent cycling use with durable materials and reinforced seams while prioritizing rider safety with reflective visibility