This middle layer is heavier than the first and includes sweaters, sweatshirts, vests and pullovers. The purpose of this layer is to keep you warm by
{"Image DocumentName": "Insulating Layer (also known as the 2nd or Middle Layer)", "Image ImageDescription": "This middle layer is heavier than the first and includes sweaters, sweatshirts, vests and pullovers. The purpose of this layer is to keep you warm by trapping air close to your body. Popular insulation materials include: Fleece, a synthetic material which maintains its insulating ability even when wet and spreads the moisture out so it dries quickly. Wool, which naturally wicks away moisture. A nice, mid-weight wool or fleece sweater, expedition weight capilene or polypropylene pullover, or fleece vest works well. In colder climates, or if you\u2019re not burning a lot of calories and sweating, wear a heavier wool or fleece jacket.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}