The Flex can be whatever you want it to be. The adjustable suspension and waist belt secure around most torso and waist sizes for a totally customizable fit. Three storage compartments are just a reach away, and four compression straps can handle additional gear. This compact pack features 650 cubic inches of storage and three interior organizational compartments. Yet with a weight of just over 1.5 pounds, you may not even realize you're wearing it. Compartments: 5 Organization Pockets: 2 Volume: 600 Cubic Inches Dimensions: Main Compartment: 8.5 x 15 x 5 Face Compartment: 5 x 8.5 x 2 Optics Compartment: 6 x 4 x 2 Tool/Knife Compartment: 4.5 x 2.5 x 1 Mesh Pull-out Pocket: 7 x 4 x 4