We built this jacket around our highly waterproof and breathable 3 Layer Titanium WxB laminate stretch fabric that is soft, quiet and moves with you, unlike traditional hard shells. Then we loaded it up with core features that make this jacket adaptable to a wide range of conditions. P.R.O. Barrier WxB 3 Layer Titanium thermo regulating laminate fabric with stretch knit face and nylon tricot laminated inside for moisture transfer and next to skin comfort. Waterproof fully taped internal seams. Welded waterproof zippers. Asymmetrical cuff s interface with gloves to create a tight weather seal.