Breathable and flexible material collection because comfort is the biggest factor people look for during undergarment shopping. First Lite is a leading tactical clothing manufacturer from the US that has revolutionized the industry with its groundbreaking technologies. First Lite’s tactical clothing is manufactured using Merino wool, Aerowool, and the 37.5 technology that will help you control body temperature and more. Select the right color of Underwear for your personality. We have Underwear available in Olive, Gray and Brown.