Water repellent nylon fabrication. Advanced Skin Warm insulation uses fiberfill fibers to reflect the warmth of your body and retain heat. Pertex Shield is a membrane that helps to resist moisture. Smartskin insulation construction is a mix of DWR Down and advanced skin warm fiberfill insulation. Motion fit keeps you going and won't slow you down with material stiffness. Hook-and-loop adjustment at back of hood helps to keep out elements. Fully taped seams assists in water-repellent construction. Long sleeves with hook-and-loop cuffs for adjustable comfort. Dual elastic drawcord bottom with locking toggles.