Patagonia Fieldsmith, Lid Pack Backpack Rucksack Purple Grey. Lightweight w/ top-loading design, 28-liter backpack w/ exterior storage & internal 15" laptop sleeve. Working Zippers & Side Release Snap Buckles. 100% Recycled Polyester (Solution-Dyed) With a PFC-Free DWR Finish. Ternary Business Logo. Cover with your own Patch. Smoke Free Home.