What Our Gearhead(R) Experts Are Saying:"I use this as a midlayer on cool, high-output days because it warms up fast but never feels stuffy. The chest pocket is super low-bulk, and the thumbholes help it sit cleanly under a shell."We pull on the AirFleece 1/2 Zip when the day calls for steady movement and a layer that can keep up. Built from 100% recycled polyester jacquard, this piece uses a circular knit structure that traps warmth while allowing airflow to move through, giving us a comfortable balance during hikes, skintracks, and fast-paced trail days. The half-zip opening adds quick ventilation when effort spikes or the sun breaks through. Elastic-bound cuffs and thumbholes keep the sleeves anchored as we reach, climb, and layer, while the bonded-zip chest pocket carries small essentials without adding bulk. Light, breathable, and reliably warm, the AirFleece 1/2 Zip becomes a go-to layer we rely on from cool trailheads to breezy ridgelines.