This large, ultra-lightweight, stretch backpack is suitable for everything from long-distance trail running to ultralight trekking. The body uses stretchy and breathable mesh recycled polyester, and combined with the compression cord, it achieves a stable compression performance and a high level of fit regardless of the size of the load. Breathable and quick-drying mesh material is used from the back to the shoulder harness, pursuing comfort during intense exercise. The pole holder located at the bottom can be removed as needed. Material: 100% Recycled Polyester Size: W29 x H39 x D9.5cm Weight: 200g Capacity: 12L Back Length: XS/S=37cm, M=40cm, L=43cm, XL=46cm Features: Body made of breathable and stretchy mesh material, 2 removable chest straps, compression cord, hydration system compatible, emergency whistle, removable pole holder, zippered main compartment, front mesh pockets accessible from both left and right sides