Good zips, highly waterproof (tested whilst cycling for 2 hours plus in some very heavy rain), vents help to keep you cool if too warm. Keeps the wind out fairly well. Could do with another pocket somewhere as 1 is not enough. 2 would be ideal. 1 for phone, and 1 for keys and snacks etc.
Overall though, it is well worth the money, as was much better than I thought it would be. Perfect for cycling!