What Our Gearhead(R) Experts Are Saying: "I like this baselayer for high-output days in cool conditions when moisture management really matters. It stays comfortable next to skin, dries quickly after hard efforts, and doesn't hold onto odors on multi-day trips. The slim fit layers cleanly under insulation and shells without feeling restrictive." We reach for the Syncrino Base T-Shirt when cold conditions demand smart layering and reliable comfort. Rab combines the natural performance of merino wool with durable synthetic fibers to create a baselayer that adapts seamlessly to changing effort levels in the mountains. It feels soft against the skin while actively regulating temperature as we move. The lightweight Syncrino(TM) 125 fabric delivers breathable insulation and excellent moisture control, wicking sweat away and drying quickly in damp environments. Merino's natural odor resistance keeps it feeling fresh over multiple days, while the added synthetics boost durability for demanding use. With a slim fit, low-bulk seams, and easy layering performance, this tee becomes an essential baselayer for trekking, climbing approaches, and extended cold-weather adventures.