Only worn once. Warmlink Technology. power bank plugs in to internal pocket, push button, and internal heat panel on your back heats up. The toastiest jacket you’ll ever wear. Blue light = on. Orange light = warm. Red light = warmest. Comes with Skullcandy power bank. Will ship with custom power bank fully charged NOTE: you will need to purchase a charger for it. You can find on Amazon for less than $10. Impeccable styling meets mountain worthy technology, the Roxy Premiere Snow Jacket is a slim fitting snow jacket that offers exceptional protection against the elements. Stretchable and lightweight nylon twill weave is backed with a 20k waterproofing and breathability, while 133 grams of crispy PrimaLoft® Gold One Insulation fill a quilted body for maxed out protection. Slim Fit – A form-fitting and feminine silhouette and Roxy's shortest jacket length. Chest Pocket, Internal Media Pocket and Goggle Pockets, Hand Pockets, Sleeve Pass Pocket 3-Way Adjustable Fixed Hood + Fixed Hood with Wire Visor + Cohaesive® Hood Stoppers Tuck Away Fixed Powder Skirt System with Snap Fasteners, Hook and Loop Closure on Cuffs Internal Lycra Stretch Wrist Gaiters with Thumbhole Roxy HydroSmart Technology Neck Warmer – Fabric is enriched with an all-organic formula that protects, calms and cares for skin in harsh conditions.