For an indoor warm up or an intense workout in Mother Nature’s gym, the Valerie Half-Zip won’t let you down. An ideal middle or base layer, it’s made of lightweight polyester with durable, woven fabric at the shoulder panels. Underarm gussets promote ease of movement, for say, raising your arms in victory. Thumb holes at the sleeve openings help keep your hands warm while you’re concentrating on bigger things. Finally, the wicking and anti-odor finish and stylish 5.11 branding make this fitted half-zip top a must-have.