The new pack arrives, the first step is to adjust some options that cannot be adjusted while carrying, such as the carrying system, read the instructions to learn how to adjust correctly. Most packs have an adjustable carrying system to fit different torso lengths, especially large capacity packs. First adjust the length of the harness system to suit your torso length, usually through the Dual Sternum Strap Adjuster, rails, Velcro or loop system, please adjust according to the instructions in the manual.

To adjust the pack with the hips up, start by placing the mid-section of the waistband (middle of the upper and lower edges) over the iliac crest. Then pull it tight and make sure it's tight enough that the buckle of the belt should be in the middle. This will give you a good foundation to carry.
Next, adjust the Dual Sternum Strap Adjuster along the rails until the strap is 3cm below the collarbone. Then buckle the Dual Sternum Strap Adjuster on the strap, lightly grasp the end of the strap, and gently tighten it until it slides down naturally from your fingers. An overly tight chest strap can cause the pack to not fit properly and, in extreme cases, even hinder breathing. If the straps are pulled too tight, you will see the outer edges of the shoulder straps lift.