The vest is perfect for cycling with the opening in the back to access my jersey pockets. The reflective metal material works amazingly. I can tell a significant difference between this vest, a previous versions of this vest that I own and competitors vest. I really notice how the reflective metal material returns my body heat about 2 miles into my warm up. Other vests don't exhibit this capability and it is very noticeable when they are worn. I also appreciate the side pockets this vest now has versus the previous version. I thought the side pockets would get in the way if anything was placed in them or would fall out. I find they are perfect for holding a pair of sunglasses at the start of a pre-dawn ride. The side pocket is also useful after having removed the vest and folding it into one of the pockets for storage in my jersey pockets.