Thin and breathable; Enhanced merino insulation; Strategic low-profile padding; EZ-ON compression fit; Composition - 40% merino wool, 56% polyamide, 4% lycra; Ideal for Training / Comfort in cold temperatures; IQ Fit: Supportive and powerful, consistent fit, all-day comfort, in any condition; Merino Wool: Ultimate warmth, added loft, superior feel; EZ-ON: Easy to install, easy-going comfort; Made in USA