Note: Calculate your own body measurements, then select your product size within the provided size ranges. A measurement in the middle of the size range is ideal. If your measurement is at the top or bottom of an overlapping range, select the smaller size for the most effective load carry. If you have a fuller bust, select the smaller size so the armholes stay properly positioned.

Chest: With arms relaxed at your sides, measure under your arms, around the fullest part of your chest.