Bong Mines Thermal Vest: This vest is the perfect adventure companion. Wear it when the weather is cool or damp, then pack it away in the pocket when the weather changes. Made from 1.18-ounce, 100% nylon with 100% polyester polyfill. The outer shell has Stormtech Showerproof durable water repellent. The breathable, quilted body has a sleek look, chin saver and internal full-length stormflap. Stormtech printed on back collar.