Patagonia Arbor Daypack 20L TMT tomato backpack. A classic backpack with a classic top opening with a padded laptop sleeve and accessory pockets to carry everything you need in a practical way in your day to day. 420 g (14.8 oz.). Body: 6.2-oz 600-denier 100% recycled and solution-dyed polyester. Fabric is certified as bluesign™ approved. Lining: 3.3-oz 200-denier 100% recycled polyester. Both treated with a polyurethane coating and a DWR (durable water repellent) finish