238 g / sq m (7.0 oz / sq yd) 64% Polyester, 29% Merino Wool (19.5 micron), 7% Nylon Double Knit—Wicking, UPF 30
Here's what other sites are saying:
The North Face Mens Aries 1/4 Zip - Closeout - Part of the Flight Series collection, this performance quarter-zip pullover is designed for endurance athletes who cherish lightweight, minimal threads in the interest of speed and agility. Athletic fit long-sleeve made from warm merino wool and nylon for optimal breathability. Wicking panels on sides and back suck out excess moisture. Napoleon chest pocket and dual pockets at back provide on-the-go stash options.
- Massey's Outfitters refers to the men's version
Go ahead and get your wintertime sweat on, the Aries 1/4 Zip from The North Face is made from a poly-wool blend that naturally wicks moisture and shuns odors while providing exceptional warmth during any winter aerobic activity. Built-in security pocket on the arm allows you to stash an energy bar to help keep you going.
- Mountain Gear refers to the men's version
The North Face Aries 1/4-Zip Top functions solo or as a layer for your highly aerobic winter pursuits. Built with merino and polyester, the Aries fights odor while wicking moisture to maintain comfort. A bicep zippered security pocket stashes your house key while you head out for a run in the frosty air.
- Backcountry.com refers to the men's version
Part of the Flight Series collection, this performance fit pullover is designed for endurance athletes who cherish lightweight, minimal threads in the interest of speed and agility. Cold-weather quarter-zip is made from a premier merino wool hybrid blend for optimal wicking and quick-drying. Wool-mesh-blend panels at back and underarms for ventilation.
- The North Face refers to the men's version