Specifications Brand: ROCKBROS Material: EVA + PU material Weight: approx. 235g Colour: black Capacity: approx. 1.5/2.5L Installation: 3 velcro straps Features 1.this bike frame bag made of EVA hard shell carbon material is more durable and shapely. 2.1.5L/2.5L large capacity is enough for your daily bike items. 3. with double zip to expand the capacity and convenient storage. 4. water-resistant material surface of the bicycle saddle bag.