This Chest Pocket is the optimal attachment for someone that wants quick access to their phone or a bit more goodies on their USWE. It's great for either a soft or hard sport bottle or adding some snacks and essentials within reach. This keeps you from having to stop and open a pocket or take your pack off. Two Models The Chest Pocket comes in two versions: NDM 1 or NDM 2. The NDM 1 can be attached to any backpack equipped with the No Dancing Monkey™ 1.0 and No Dancing Monkey™ 1.2 harnesses. It's specifically more of a phone pocket. The NDM 1 is compatible with the following models: MOTO Hydro MTB Hydro Airborne Ranger Vertical Patriot Outlander The updated NDM 2 can be attached to any backpack equipped with the No Dancing Monkey™ 2.0 and No Dancing Monkey™ 2.1 harnesses. It's simple to attach with 4 plastic clips and clicks on. The NDM 2 is compatible with the following models: Hajker (Not Winter) Hajker Ultra Hajker PRO Brant Tracker Shred Flow Core Watt