Patagonia Poco Mas 15L Backpack. We make the Poco Mas daypack for kids who go through life leaving a wake of debris behind them. It has all the organizational features they’ll need, with enough room to accommodate books, lunch and a hoody. The uncluttered main compartment includes a simple sleeve pocket for essentials and a clamshell zipper for quick and easy access. A zippered front pocket contains an organizer for pencils and easily lost items; a key clip provides a secure place for a bike lock key. Exterior features include mesh side pockets to carry water bottles, a bike light attachment loop, and reflective trim and webbing zipper pulls for visibility. Shoulder straps are padded and mesh lined. An internal, hand-me-down ID label helps parents track down the pack in the lost-and-found. Made from a tough, yet supple, 420-denier 100% nylon oxford plain weave with 840-denier 100% ballistics nylon reinforcements. The lining is 200-denier 100% polyester. All fabrics have a Deluge DWR (durable water repellent) finish. Features: Main compartment with ID label inside; front pocket with organizer and key clip; mesh water bottle side pockets. Padded, mesh-lined shoulder straps for comfortable carry; reflective webbing zipper pulls. Bike light attachment loop and reflective trim. Body: 420-denier 100% nylon oxford plain weave. Base: 840-denier 100% ballistics nylon. Lining: 200-denier 100% polyester. Mesh pockets: 92% nylon/8% spandex. All treated with a Deluge DWR (durable water repellent) finish. 417 g (14.7 oz) Made in Vietnam. Deluge DWR: Patagonia’s proprietary durable water repellent fabric finish, Deluge DWR, lasts substantially longer than standard DWRs. Garments with the Deluge DWR finish have like-new repellency after years of extensive use.