USWE Zulo Waist Pack 2L - Carbon BlackThe USWE Zulo uses a compression strap system for a slim and secure profile, making the hip pack fit you perfectly and giving you zero bounce while in action. The cargo compression keeps your gear close to your body for better balance and increased pack stability while on the bike. It has a lightweight mesh back panel and is the optimal option for the serious riders who need to bring hydration without a backpack.