What Our Gearhead® Experts Are Saying:“This layer is my daily driver for shoulder-season hikes and trail runs. The 1/4-zip makes it easy to vent when I’m heating up, and the soft stretch jersey feels great against the skin. It’s breathable, moves with me, and fits just right—not too tight, not too loose.”The Altitude Tracker LT 1/4-Zip Top is that just-right layer we reach for whether we're heading out for a morning jog, powering through a crisp trail ascent, or simply staying warm during weekend errands. Crafted from buttery-soft recycled polyester and elastane jersey, it stretches easily and regulates comfort through high-output activity and changing temps. Built with an athletic design that includes raglan sleeves, side seam panels, and a zipper chin guard, this top delivers mobility, comfort, and thoughtful performance details. The quarter zip allows us to cool down when things heat up, while the standard fit makes it easy to wear alone or under a shell.