This short is the Relaxed Fit version of our best selling Sykes PX Short. A running with rear center zip phone pocket and two rear zip storage pockets. Fabric Toray Primeflex. Relaxed fit is for athletes that like a little more room in the leg and an overall looser fit. This fit is also great if you have larger quads or thighs. This product used to be called Backbone PX short, it was renamed on 7/7/23.