They don't call you a ninja for nothing. Now you can live up to your name in the new 686 Thermal Airhole One Piece that's not only the most comfortable thing you've ever thrown your body into but also one of the toastiest base-layers we can think of. Featuring extra soft flatlock seams for a superior fit, and 686's signature Airhole™ Breath Hole and Balaclava so you don't have to worry about neck gaiter discomfort, this is the base-layer that will have you laying down the moves on the mountain in no time.