Timbuk2 Classic Messenger Bag Medium, Jet Black Size:M 1 680 denier polyester with so your devices could 1 680 denier polyester with 600 denier polyester canvas accents Hydration port at top Main compartment with dedicated padded laptop sleeve hydration pouch Air mesh padded back panels Ergonomic air mesh padded shoulder straps Sternum chest strap Stretch air mesh side pockets Front zippered pocket with key clip Side entry front flat zippered pocket Daisy chain attachment system Laptop sleeve dimensions: 13 h x 12 w x 1 d This expanded version of the Classic Notebook has 400 pages and 2 ribbon bookmarks to capture and keep track of more ideas than ever Double ribbon bookmark Ruled format Expandable inner pocket Ivory colored 70 g m² acid free paper 400 pages (200 sheets) Notebooks come packaged with a Moleskine branded paper band and are individually shrink wrapped Add a Custom Band (Item # 505) Eco Cordura is made using recycled pre and post consumer materials Weatherproof exterior and waterproof 70D TPU liner resist moisture Aircraft grade 6061 aluminum tri glide buckle adjusts strap quickly OrthoLite® foam strap pad provides lasting comfort and support Switchable shoulder strap lets you choose right or left handed carry Dual side vertical zip front pocket offers fast access to essentials (S L) Spacious interior with extra organization and dual water bottle pockets