Pearl Izumi Men's Fly Convert Jacket - Lightweight Waterproof Cycling Windbreaker for Outdoor Sports (Screaming Yellow/Black, Small) - Perfect for Biking, Running & Hiking Adventures

I was a bit skeptical about this at first as it seemed quite flimsy. However 1 year on, it is still going strong and is my go-to top for winter runs. The pocket at the back is good to fit the arms, or equally I use it without arms and put hat / gloves in the pocket.