“Incredibly warm, thin. comfortable”

“I bought 3 of these and just used them on a steelheading trip. Great base layer because it is so thin and snug, snug fit in sleeve keeps them in place. Still, doesn't feel tight, and incredibly warm for its ultra light weight. I can't wear one inside the house, it's too warm. Zip collar allows ventilation and flap under the zipper protects from wind and rain even when fully open. One of these will fit perfectly under my flight coveralls for early season flying.”