The ATOM 2 W backpack is designed according to the female morphology. It is worn like a vest on the skin. 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. Equipped with 2 flasks of 250ml worn on the front of the bag, it is also compatible for holding flask pipettes on the front of the backpack. 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.