ARC Merino Sleeveless Base Layer

Wore this under a jersey on a windy 50-degree ride and my core stayed warm without the clammy feeling I usually get from synthetics. The merino blend is soft enough that I forget I have it on, and it doesn't stink after a couple of rides.

Finally a sleeveless layer that actually keeps me warm without overheating during my morning hikes. I wore it under a light jacket in 45-degree weather and stayed comfortable the whole time. The temperature regulation is real, not just marketing talk.

The fabric from Biella feels noticeably finer than other merino I’ve owned, and after a chilly morning hike it kept my core warm without any itch. This is my second week wearing it under a shirt almost daily, and it still holds its shape after several washes.