Most arm warmers are simple fleece-backed stretchy fabric or plain-knit tubes, which makes these high-tech knitted sleeves from Craft an immediate hit.
Multi-weave and density body mapping design has been used in socks for a while, but this is the first time we’ve seen arms benefit. Thicker knit on the back and bands on the inside of your elbows keep them close-fitting and wrinkle-free. The fit is excellent, and silicon grippers stop them sliding down, too.
While they’re not water or windproof, they stay cosy when wet and dry really fast, making them great three-season shirt extenders, even under a jacket. The price is reasonable compared to basic alternatives.