Here's the whole set of jacket and pant liners, gloves, and dual heat controls. Note that the connectors are located in zippered pockets for storage. The jacket is a close fit with Lycra panels on each side. It's a lightweight, breathable nylon shell that works well as a light jacket over a T-shirt. Wearing a windproof outer jacket will increase its effectiveness. The heating pads are in the front, upper and lower back, sleeves, and collar for complete coverage.