What you should know: This is your most important layer because it directly touches your skin. It should wick moisture, remain odor free, and fit comfortably. Avoid cotton at all costs.
Credit: Photograph by Greg Broom
Powered By ZergNet
Gear of the Year
102 of the Best Tools, Toys & Tech
Plus: The Woman Who Bails Out the NFL's Bad Boys
ON NEWSSTANDS NOW
Joby Ogwyn: The Man Who Fell to Earth
Life Advice from John Cleese
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.