Attachment is easy and safe to the existing eyelets on the aluminum case. Adjustable fastening straps allow adaptation to different case sizes. Made of high quality 500D PU fabric with PVC coating, absolutely waterproof, hard-wearing, abrasion-resistant and permanently UV-resistant. Waterproof zippers keep the contents dry even in heavy rain and at high speeds. Dimensions: width 46cm, depth 22cm, height 17cm, volume 15 liters.