What Our Gearhead(R) Experts Are Saying:"I wore this base layer on a cold, wet century ride and never once felt clammy underneath my jacket. The merino wool kept the chill off during long descents without feeling bulky under my layers. It's become my go-to piece for early season rides when the weather can't make up its mind."The Merino Long Sleeve Base Layer is built for the mornings when the forecast can't decide what it wants to do, and neither can you. Rapha designed this piece to sit close to the skin, so it moves with you from the first cold descent through the climb that warms you back up, without ever feeling like an extra layer you forgot you were wearing. Merino wool does the heavy lifting here, pulling moisture away from the skin while a touch of recycled nylon and elastane keeps the fit close and flexible through every position on the bike. It's the kind of base layer that disappears once you're moving, quietly managing temperature and odor so you can stay focused on the road, the trail, or wherever the ride takes you next.