From the manufacturer

Designed with runners in mind, the new Hip Belt + Single Bottle Base is a sleek way to optimize storage and hydration on the trail. Magnetic-mechanical TWIST Base keeps your hydration secure and within reach. The magnetic, self-healing, HERMETIC Dry Bag keeps your phone and other valuables 100% protected from water, dirt, dust, and sand. It is also equipped with Fidlock's Patented Magnetic Fasteners for quick and easy opening and closing within seconds, even when wearing gloves. 

Features

• 100% Waterproof Dry Bag compartment
• TWIST base
• TWIST 450 bottle in the color Smoke
• Small zipper compartment
• Adjustable hip straps
• Compatible with all TWIST Bottles

Specifications

• Hip Circumference: 70-150 cm
• Weight: 260 g
• Volume: 0.6 L