Field Supply has 30L 5.11 Tactical Dart24 Backpack, Night Watch color, on sale for $35 plus free shipping, regularly $129.95.
https://www.fieldsupply
Features:
Top loading main compartment with T puller
Removable accessory board with padded laptop sleeve and admin org
Accessory board can be inserted in main compartment, rear compartment or removed completely
Left entry side compartment with admin org and right entry side compartment with web MOLLE platform
Fleece lined eyewear/media pocket
Side stretch pockets
Dual zipper access too rear CCW compartment with loop panel for Tactec or hook/loop accessories
Hydration compatible rear compartment
Quick release shoulder straps with articulated webbing loop design
Triglide for optional waist belt attachment
Water-resistant 420D Nylon
Features 5.11′s signature Centerline design
Specifications:
Main Compartment: 18.5"H x 11"W x 7"D
Total Capacity: 1830 cu.in./30 Liter
Weight: 3.2 lbs
Fits up to a 15" laptop