Long johns, base layers, skivvies—there are many names for thermal underwear for men. But the main purpose ... snowboarding, or running. Synthetics retain heat even when they get wet, wicking ...

LET'S BE FRANK: Thermal underwear is arguably the least sexy type of underwear for men on the market ... ergonomic pouch with sufficient space to support your nether regions.

These base layers prevent sweat buildup and protect against the cold, whether you’re working outside or hitting the slopes.