Looking up Niveous in the dictionary (or the 21st-century equivalent: thumping it into your search engine) gives you the following definition: Niveous, adj. snowy or resembling snow. With that in mind, it would seem that Niveous is a rather apropos name that Dare 2b have given their snow gaiter, as it is indeed designed to, in part, keep snow from filling your maw after you take a minor tumble on the slopes, mouth open wide in surprise. Fight fire with fire and snow with snow.
Etymology aside, the Niveous neck gaiter features warm, back stretched fabric allowing it to contour to your body for a near bespoke fit, alongside a reflective detail so all your friends can immediately spot you in the snowbank, spluttering out ice and slush following your little tumble.