Part courier bag, daypack and carry-all, the Atom's teardrop shape provides the support of a daypack by positioning the load behind your shoulder. The single-strap design makes getting to the goods simple: Just spin it around front. The large zippered main pocket has zippered mesh and stretch-woven pockets inside to organize small items. A convenient zippered pocket on the shoulder strap has a soft lining to protect valuables. Breathable 3-D spacer mesh pads the shoulder strap and back panel to wick moisture, dry quickly, and increase ventilation. For biking and hiking, a stow-away waistbelt keeps the pack close to your torso. Made of a 420-denier 100% nylon oxford plain weave, with an 840-denier 100% ballistics nylon bottom. The lining is 200-denier 100% polyester. All fabrics have a Deluge® DWR (durable water repellent) finish. Details - Teardrop pack shape positions the load behind the shoulders - Single-strap design makes getting to your things simple; just spin it around front - Zippered main pocket has internal zippered mesh and stretch-woven pockets - Convenient zippered pocket on the shoulder strap is lined to protect valuables - Breathable, moisture-moving 3-D spacer mesh pads the shoulder strap and back panel to keep you cool * Adjustable buckles for lashing items to the exterior * Body: 420-denier 100% nylon oxford plain weave. Base: 840-denier 100% ballistics nylon. Lining: 200-denier 100% polyester. Stretch-woven pockets: 92% nylon/8% spandex. All treated with a Deluge® DWR (durable water repellent) finish * 309 g (10.9 oz) * Made in Vietnam. Technology 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. Color: Black