Yes, you know Smartwool socks, but do you know Smartwool's base layers? This version of Smartwool's key layer top is done a very fine Merino wool blend, providing lightweight warmth when there's a nip in the air. The top has long sleeves and a flatlock seam construction that helps prevent chafing; the fit is quite close. Merino wool naturally helps regulate body temperature, transports sweat away and cancels out odors.

• Our model,Julia, is 5'9'. She's wearing a size XSmall here, whichfit nicely. Julia's measurements: Bust, 34 inches; Waist, 25 inches; Hip, 36 inches.
• 88 percent wool, 12 percent nylon.
• Machine wash, cold, gentle cycle; lay flat to dry.