After 1 test ride (3 hrs), these worked great! I was a little worried about sizing but the mediums have been great for me (for context, I'm 6', 155lb, and have relatively lean arms for my body type). They fit snugly but didn't cut circulation off, and kept me warm on a ride into the Colorado foothills (and back down) on a cold, windy Saturday in March. Looking forward to putting them to more use, but so far, so good!
Fits great, I have skinny-as-**** arms and these stay up right where they are supposed to. Warm and breathable too.
The arm warmers are very warm and cozy. But they are definitley on the tight side. I got them for my brother who is 5'10" and has larger than average arms. He says they are super warm but that they are so tight that his wrist sometimes hurts. I got him a size Large, so he'd probably be okay with the XL. I know it's a tough balance because if they are loose they will slide down. So I just probalby needed one size larger for him. Overall, they are super warm and great quality and I will probably get myself a pair too.
These just work well. Kept me warm, stayed in place. I don't usually write reviews but I have been so pleased with all the products I received from Ornot that I'm happy to promote them. Especially since they are minimally branded (which I love as well).