WATERPROOF MATERIAL INNER MESH POCKET ADJUSTABLE MOUNTING CLIP FULLY WATERPROOF: This bike panniers was made with 840D nylon material and TPU coating on the surface ensures the well waterproof performance for you, do not worry about getting caught in the sudden rain or storm. DO NOT TOUCH LEGS: The triangular structure is stable, effectively prevent bike pannier from rubbing your legs while riding. Durable nylon fabric also prevents external friction from affecting the using performance. 20L LARGE CAPACITY: Each bicycle pannier are of 20L capacity, enough apace for your short-distance trip, could holds your change of clothes or some essentials. Also suitable for daily commuting or transport groceries. EASY TO INSTALL: Equipped with two sturdy hooks on the top for mounting on the rear racks, it can be adjusted left and right to find a suitable position, bottom 360°rotation clip for fixed on the side bars for prevent it from shaking during cycling. FRIENDLY DESIGN: This bike rack pannier bag come with one removable shoulder strap, you can carry the bike pannier on the shoulder while not cycling. Reflective sign on the front and two sides warning others when cycling at night to ensure your safety.