Nathan X Trainer Mutation

Nathan's X Trainer Mutation bottle pack flat-out gets it done. Insulated, bi-directional holster for standard 22 oz. water bottle? Check. Horizontal side holster for quick access to 5 oz. nutrition flask? Check. Stretch mesh side pocket to carry other small items? Check. Shock Cord with one-pull tension lock for jacket or gloves? Check. The most important feature of the X Trainer is the bottle holster. It sits horizontally for an ergonomic lumbar ride, and is accessible from either the right or left side. That means no awkward angles and no fumbling to get the bottle in and out of its holster. Constructed of Nathan's lightweight, breathable Wall Mesh with soft perimeter binding, with a limited-stretch mesh elasticized waistbelt. One size fits waists 26" to 42". Nathan ID #4477