The ATOM 2 backpack is worn like a vest on the skin. It is designed to meet the constraints of the most demanding athletes. This ultra-light backpack allows you to carry essentials for training sessions and short outings. Its 3D mesh Coolmax® All Season materials offer unique comfort in the world. it improves the body’s thermoregulation, and improves its physical performance. Perfect balance between lightness and stability. This backpack is ideal for the short distance Trail, or the marathon. This minimalist bag offers 2L of storage space, thanks to its pocket secured by a self-locking zipper. The accessories are quickly accessible and very well maintained. This pack vest is so light you’ll forget it. It is ideal for running in hot climatic conditions.