Field Pouch is an expanding pouch for cords, accessories, batteries, SD cards, hard drives, and even mirrorless cameras and lenses. The bag is a winner of Carryology's Best Accessory award.Keep it in your bag, wear it on your belt or attach any Peak Design strap to turn Field Pouch into an ultralight sling bag. With an expandable roll-top design, a weatherproof nylon canvas outer shell, and felt inner padding, Field Pouch can safely hold and organize all of your odds and ends. It also includes an attachment point for Capture, making it an ideal bag for carrying mirrorless setups. Weatherproof 400D nylon canvas shell.