Castelli diluvio glovethis is your glove for cold andor wet conditions the japanese neoprene is some of the highest quality available and this is what makes it so stretchy comfortable and warm the seams are constructed using the same technique as a wetsuit the stitching is only on the outside while the inside is thermo welded to make it smooth and completely waterproof while the waterproofness is an obvious benefit in the rain whats not so obvious is how good this glove is in the cold i