I received my Alpha SV bib last week and took used it today in western California where it was raining. It's bomber and was great for a few hours until at one point I was sitting down and I felt cold water trickle into the bib at the crotch completely soaking my baselayers and underwear. Luckily, my underwear was wool and didn't absorb too much of the water, but I quickly got cold and that put an end to my day. The crotch zipper may be perfect for many others, but to me the risk of having water leak in at the crotch area during rain isn't worth it. I will be returning this item and getting the Theta SV bib instead. If it weren't for this fatal flaw it would be a 5-star item. Fit was great. Construction is exceptional.