The Q36. 5 Gregarius Hybrid Light Long Sleeve Jersey maps its fabric by body zone, balancing insulation, wind protection, and breathability in a single performance-fit layer. A full-length front zip and three rear pockets plus a fourth zippered pocket keep the jersey functional as a standalone piece rather than a baselayer waiting on a jacket. What Our Gearhead(R) Experts Are Saying:"My chest stays warm on a cold descent while my underarms never get clammy on the climb before it."