What Our Gearhead® Experts Are Saying:"This is the piece I grab when I’m heading into variable conditions. The gridded fleece breathes like a champ while the windblock zones keep chill gusts from ruining my day. Great fit, smart design, and seriously versatile."The Tribrid Full-Zip Top is built for missions where movement, breathability, and thermal regulation all matter. With a hybrid design that blends gridded fleece insulation and windblocking overlays, this midlayer works smarter in dynamic conditions—whether you're skinning up ridgelines or powering through shoulder-season trails. Designed with precision, the Tribrid’s strategic fabric mapping uses lightweight brushed fleece for warmth, abrasion-resistant woven panels for protection, and Japan-milled TREO fabric in high-mobility zones to optimize airflow and stretch. A secure zippered chest pocket and stash pocket at the back make it pack- and harness-friendly. With elastic at the cuffs and hem to seal in heat, the Tribrid Full-Zip Top thrives in motion.