Roswheel 13567 0.5L Capacity Bike Bicycle Saddle Bag Under Seat Pouch Road Bike Accessories Pack MATERIALS: made of 600D tear resistant polyester, solid and durable. EASY & QUICK INSTALLATION: simply mount or release under bike seat or seat post with 2 Velcro straps and one elastic cord. Suits for almost all types of bicycle saddles or seats. BETTER SAFETY: reflective strip, reflective logo and taillight loop for better visibility when riding in the dark or on night. CAPACITY: 0.5 Liter capacity, perfect for casual riding. Just holding spare inner tube, tire levers, puncture repair kit or daily essentials. SIZE: 6.75(L)x3.1(W)x2.7(H) inches.