The LUXE Merino Long-Sleeve Jersey uses ultrafine merino wool threads to hold steady through a wide temperature swing, built for rides that start at 45degF and finish closer to 65degF without a wardrobe change. Articulated on-bike coverage and medium compression keep the fit close through hours in the saddle. What Our Gearhead(R) Experts Are Saying:"I left the house in arm warmers and came back without them, and the jersey handled both ends of that ride without ever feeling wrong. Merino does that in a way synthetic jerseys just don't."