The HIPSTER4 is a reduced-to-the-max, super-light, super-slim hip belt with a Racelite AIRFLOW Flow System vented back and hydration system compatibility.Features:Auto-compression Hip Belt:- The Auto-Compression Hip Belt lets you cinch in tight and has a 3-point articulating design for extra comfort.Key Clip:- The Key Clip keeps your keys high and handy - no more digging around the bottom of your bag.Custom-mold Zipper-pullers:- Custom-Mold Zipper-Pullers are super-stretchy and make it easy to put on and take off gear no matter what the conditions.Multifunction Loops:- Multifunction Loops can take absolutely anything from poles to shovel handles.Air Circulation:- Air Circulation is AMPLIFI’s specially designed ventilation system for temperature regulation.Reflective Security Parts:- Reflective Security Parts are hi-viz webbing and prints that let cars see you when it gets dark and foggyHip Belt Pocket:- The Hip Belt Pocket is a great stash for loose change, your cellphone and other small items.Backlight Clip:- The Backlight Clip gives you somewhere to attach a rear lamp in low-viz situations.Hydration Compartment:- Our Hydration Compartments fit hydration bladders by most major brands.Specifications:- Material: Nylon (Polyamide) | YKK Zippers | High Performance Accessories - Size: 4L- Weight: 350g | 480gTECH TALK:3D PANELS:- 3D Panels are thermoformed from EVA and elastane. They are lightweight and comfortable on long hikes or super-steep runs in any weather.