Just back from a five-day, 1200 mile motorcycle trip chasing corners from Pittsburgh to Southwestern Virginia and back. Temperature ranges as varied as the terrain and road conditions. From 80s in the valleys in bright sunshine to 25 miles of 48 degree, fog-bound creeping along the Blue Ridge Parkway to the 56 degree high-speed jaunt home on Monday. I never took this hoody off once (other than to shower). Thin polyester long-sleeve underneath when it was hot and light insulated vest on top when it was cooler. Never too hot and never once cold. I've always been a fan of merino wool since my first really good cycling shorts in the 1970s. The new clothing applications are outstanding and this is a great example. I'm 6', 215lbs, long-waisted and the XL is perfect. And it never smells!