Adjustable top strap makes this chest pack fit most radio sizes. Includes battery pouch, map pocket, and pen holder. Our chest pack comes in either a nylon mesh back for a cooler wear, or a solid fabric back with 1/8" foam to provide padding between your chest and the radio. Chest packs are 10"x10" and have a side opening map pocket. One inch nylon straps cross in back for easy adjustment.