Review on 🚴 ROCK BROS Thermal Arm Warmer: Unisex Arm Sleeves for Enhanced Cycling & Running Performance by Victor Correa

My wife and I ordered the same brand. She has XS-M, I have L-XL according to the size chart. I accidentally opened it and used it (first ordered, first come). They were easy to put on, which I think should be, but the elastic around my biceps was still loose. But there's enough stretch throughout the sleeve to keep it in line. I only noticed the size on my first ride with them. My L-XL arrived the next day (marked XL on the box). When I tried them on I found that they are more comfortable for most of my arm as they are not as tight but the bicep issue is worse and there are gaps. However, thanks to the aforementioned ribbing in the main part of the sleeve, the sleeve stays in place. So if you're looking for the perfect fit, you either need good biceps or you need to find another brand. If you agree that they "work well" but don't really fit, then you'll be okay with that.