DESIGN: Made to fit several Three Peaks bag, features external rear hooks to attached to the outside of the Travel / Adventure 42L, Travel / Hybrid 30L. CAPACITY: 8L volume with dimensions of 22.5cm x 30cm x 12cm, providing ample space for adventure gear and travel essentials. LIGHTWEIGHT CONSTRUCTION: Ultra-light design weighing only 0.20kg, making it an ideal companion for travel without adding unnecessary bulk.