I got these bibs last fall. Used them all winter long and I can tell you that I didn't feel the winter cold at all. I know it wasn't the coldest last winter here in MN, but these fit great and don't have to layer up much underneath. I'm 5'7 and being able to adjust the bottom with out wearing out the bottom cause you walk on them is great. I use these open water as a rain gear also. A bit warm on the warmer days, but they keep you bone dry. Just had them up on lake of the woods with the waves crashing and getting us wet trying to cruise out on the big lake. Great great product.