This is a very good gilet. The front is windproof while the back is mesh for cooling. I bought XL which works for my 42/44 chest. The gilet rolls up very small and is easily stashed. The two rear slits allow access to jersey pockets. The zip seems robust and the garment is very well made, like all VC kit.
This is a very useful garment to carry with you (it can fold up small to fit in your pocket) in the event of changing weather conditions during your ride. Start the ride wearing it, remove as the temp increases. Or keep it in you pocket if required later. It will stop the wind chill on your chest, but it has a mesh rear panel, to prevent your back from overheating. (This is an important consideration for me.) Sizing is accurate, in a racing (snug) fit. I am 184cm and 90kg, and the XL is a perfect fit. If I was wearing a few layers I would need the XXL.
Perfect for what I needed, it's lightweight and can fit in my back pocket easily to keep as another layer if I get cold. Essential piece of kit that I always carry now.