GORE-TEX Performance Shell Double-headed Front Zipper. Backpack Compatible Venting. Relaxed Non-bulky Fit. Microfleece Comfort Collar. The redesigned Storm Jacket is a solid mountain shell with a relaxed fit for mobility on the sled and improved ventilation to keep you comfortable. The new insulated AMP Electronics Pocket is a special pocket to keep your phone from getting cold and killing the battery. Waterproof, breathable fabrics keep you dry while multiple vents introduce cooling airflow as needed.