What Our Gearhead(R) Experts Are Saying:"This is my go-to midlayer for cold runs or hikes. The RealFleece fabric is insanely soft and traps just enough warmth without overheating. I love the venting under the arms-it really dumps heat fast when I'm pushing uphill. It's lightweight, packable, and feels premium every time I wear it."When the pace picks up and the air turns crisp, we layer up with the Icebreaker Merino Blend 200 RealFleece Descender 1/2-Zip Top. Designed for high-output pursuits, this midweight layer combines the cozy warmth of RealFleece(TM) brushed merino with the cooling performance of TENCEL(TM) Lyocell for breathable, moisture-wicking comfort. Panels of Cool-Lite(TM) mesh under the arms enhance airflow during intense activity, while flatlock and offset seams prevent chafing under packs. The hidden chest pocket keeps small essentials close, and thumb loops lock sleeves in place when layering. From dawn patrol runs to alpine climbs, the Descender delivers natural performance and next-level comfort in every motion.