Mission Workshop is giving its best-selling backpack a material and hardware upgrade with the Rhake: VX. The new version of the backpack is constructed out of a two-layer VX-21 diamond ripstop fabric, which was chosen for its thorough abrasion, tear, and weather-resistance. It also gets upgraded with magnetic Fidlock buckles that makes it easy for one-handed opening and closing. As with the previous bag, the Rhake has 22L of storage, a versatile roll-top design, and an array of pockets for laptops, tablets, and all your gear. 

$455, missionworkshop.com