The black Keep It Up Shoulder Strap from Think Tank fits your optional Pro, Steroid Speed and Thin Skin Belt. This fully adjustable strap can readily be switched between shoulders for both functionality and comfort. It's basic use is to change any modular/skin component into a shoulder bag. For storage, there's a handy memory card holder and stretch pocket for your iPhone or optional Pixel Pocket Rocket.
It's made from 100D rip-stop nylon and contains metal buckles as well as strong Rock Lockster buckles that are male-female coupled for maximum strength. The strap also contains 3-ply bonded nylon thread. The beauty of the strap is that it can be moved from one shoulder to the other without having to remove your belt. This comes in handy when you wish to minimize the stress of carrying heavy loads for a long time.