Beast Crux Insulator JacketDescription Pound for pound, the hardest hitting and most breathable technical insulator anywhere. Recycled 100g Primaloft insulation and 30D micro ripstop nylon shell assure packability, while a combination of AirTech 3D Eco and DryTech 3D softshell under arm allow the garment to stretch, breathe, and transport moisture better than any insulator you've ever met. One handed hood cinch allows for on the fly adjustment. Fit is kept trim for functional