The XTouring Frame Bag DRY is designed for the needs of long distance ultra races, but not only for them.it fits in the space inside the main frame triangle to store heavier and bulkier items, but also items that need to be accessed while in the saddle. Made by HF welding, which is waterproof and lightweight. Shaped to be universal for most frame triangles. The ZIP-LOCK design is waterproof and protects personal and electrical equipment. Can be easily combined with Top-tube Bag DRY.