2109991 Mountain Hardwear Field Day 28L Backpack From the trail to the lecture hall, one thing remains the same-you always want to show up prepared. Built with the same burly materials as Mountain Hardwear's packs, their Field Day Packs offer trails-first features like a large stretch woven shove-it front pocket (perfect for a layer or other easy-access essentials) and two exterior bottle pockets. A fully padded laptop sleeve and internal organization ensure you're ready for your next challenge-in or out of the classroom. 210D high-tenacity CORDURA ripstop shell is lightweight yet super durable Stretch woven front dump pocket with SR buckle closure and dual water bottle pockets Main compartment with padded fleece laptop sleeve, tablet sleeve, zippered pocket, and two elastic dump pockets Foam back panel and shoulder straps with mesh overlay for breathability Top access fleece-lined compartment to protect sunglasses and phone screens Webbing tool loop and cord tool keeper to lash external gear like trekking poles Hydration resevoir hang loop and hose port Removable sternum strap with emergency whistle Reflective hits on the bike light clip and shoulder strap C0 DWR on lining and shells Measurements Approx. Pack Weight Regular: 1 lb 14.3 oz / 859 g Pack Capacity Regular: 1709 cu in / 28 ltr Pack Dimensions Regular: 19.7 in x 11.4 in x 10.2 in / 50 cm x 29 cm x 26 cm Torso Size Range Regular: 16i in - 22 in / 41 cm - 56 cm Waist Size Range Regular: 30 in - 48 in / 76 cm - 123 cm Materials Body: 210D CORDURA High-Tenacity Nylon Ripstop | 100% Nylon Lining: 200D Recycled Plain Weave Polyester | 100% Recycled Polyester Accent: 4-Way Stretch Nylon Plain Weave | 86% Nylon / 14% Elastane