Under Armour Men Primaloft&reg; Insulation Wolfe Bomber Jacket 100g Primaloft insulation is lightweight, water-resistant, and breathable, with the ability to be compressed without losing its superior warmth. UA Storm gear uses a Durable Water Repellent (DWR) finish, which repels water without sacrificing breathability Secure 2-way entry pockets with warm interior. Interior zip media pocket with audio loop. Zipper garage for low irritation. UA MTN gear that covers bluebird days to blizzards. Shell: Nylon/Polyester.Lining: Polyester.