I have tried neoprene, your hands are wet but warm, as long as you don't have to take the gloves off, (which is a slow process) for paperwork, giving change etc, and after a few days, if you don't wash the gloves, they stink.
I tried the waterproof cycling gloves from Aldi, they let in at the seams-I will be returning them.
I have just ordered these gloves-Showa 490 Insulated PVC Gauntlet Blue Size 10 - Pair 9.49.