Fourth Element Xerotherm Wrist Warmers

I use these as liners under my drysuit wrist seals to keep my hands warmer. They work, and I have had less problems with cold hands. The liners allow some -- not a lot -- of air to pass between the suit and dry gloves, enough that I don't need to use tubes any more. The glove sizing is larger than expected. If you're between sizes, I suggest going to the smaller size. My hands are typically Large size so I ordered the large Xerotherm wrist warmers, but I should probably have ordered medium.