The Havoc cell phone holster is the perfect accessory for carrying your phone while wearing your bag. They attach to your shoulder straps via a hook and loop system. Just like all of our bags, our phone holsters are made from 1000D Cordura and lined with truck tarp. This sized holster fits a phone roughly 2.75×6 inches. Tested to work with Galaxy S3 and Iphone 5 phones with most cases, and Galaxy S7 and Iphone 6 and 7 (not plus) without cases. Untested, but might fit S7 Active without a case as well. These can be made to mount to either a shoulder strap, or belt. Just chose whichever style you need.