Features Bergans RS3 Stability System Back, shoulder straps in ventilating foam with mesh surface Zip access to the main compartment and front compartment Includes Source 2 L (0.5 gallon) hydration system Internal zip pocket for small items Description Bergans Backpack: Finally, a training and competition pack that is stable on your back under all conditions! This Rondane Backpack by Bergan is great. Our new patented stabilization system - RS3 - prevents the pack from "hopping" when you're engaged in high-intensity activity - perfect for running, cross-country skiing, and off-road/mountain biking. The integrated Source 2 L (0.5 gallon) hydration system helps you stay hydrated, and pockets on the shoulder straps provide easy access to nourishment. It has Bergans RS3 Stability System. Back, shoulder straps in ventilating foam with mesh surface, Zip access to the main compartment and front compartment. Includes Source 2 L (0.5 gallon) hydration system, Internal zip pocket for small items, 2 internal pockets for tools/pump/phone etc. Side pockets. Pockets for nourishment on shoulder straps, Stabilizing belt with attachment points for hip belt pockets (optional accessories). Belt stows in its own pocket, and Stabilizing belt with attachment points for hip belt pockets (optional accessories). Belt stows in its own pocket. 4650