A small (capacity: 12L) trail running pack that combines fit and functionality suitable for races. The main fabric is lightweight yet durable 100 denier recycled ROBICR nylon. It is a vest type with a high fit, and the length of the shoulder harness can be easily adjusted, and there are two chest straps that can be removed and adjusted to improve the fit, so you can get a fit that suits your body type. The shoulder harness has a bottle pocket, so you can easily stay hydrated while on the move. The bungee cord specifications can be adjusted using the hooks on the side, allowing for external attachment of trekking poles and side compression. This is a new standard model recommended for first-time trail running packs, with features such as a zippered pocket inside the main body that is convenient for storing small items, and a dedicated reservoir compartment (1.5L compatible). [Function] Shoulder harness whose length can be easily adjusted to suit your body shape / Replaceable bungee cord / Shoulder harness with bottle pocket / 3D stretch pocket with zipper on the left side of the lower part of the shoulder harness / Lower part of the shoulder harness Three-dimensional stretch slit pocket on the right side / Zippered mesh pocket inside the main body / Reservoir dedicated compartment (1.5L compatible) / 2 chest straps to improve fit / Lash point / Reflector Dimensions: H40 x W22 x D8 .5cmCapacity;12L