“Used the prime vest few times. Size is as expected: was in between XL and L and chose the L for the seamless fit and it does. Fits nice over a thickets thermal shirt and the MAAP LS jersey. Nice set and keeps me warm on race bike at 0 degrees C. The double zipper is a big plus so easy access to the jersey pockets. So far tested in dry conditions and looking forward for a wet day to see how it performs then, expect it does keep water off looking at the material”