New Men's Thermal Underwear Styles available: turtleneck and crew neck. HOT LIGHT Long-sleeved shirts with heat retention. Set of 2: black and gray. These are thinner than other men's underwear I have listed, so they look sleek. They can also be worn for a long time. I also have other thermal underwear for men in sizes M, L, and LL. - Colors: Black, Gray - Style: Long Sleeve - Features: HOT LIGHT, Heat Retention Thank you for looking.