Feather light and cut to move, the Tech Tank excels during high-output activities, in the heat, and as comfortable daily wear. Built-in racerback style with VOORMI&&';;s DUAL SURFACE(TM) UL performance-wicking fabric with co-knitted wool, it&&';;s equal parts breathable, sun-protecting, and odor-preventing for even your toughest workouts. Perfect for a day on the river, running in the desert, or simply enjoying the scenery. Relaxed Fit. activity activity features DUAL SURFACE(TM) UL Precision Blended Wool Fabric Weight: 120 g/m2 Fabric Made in Japan | Garments sewn in Vietnam