Waterproof, breathable, comfortable, durable and they stay put. Not to mention extremely abrasion and puncture resistant. Great gaiter.
Been using these for 2 years now, they are alright but far from amazing. The buckles failed quickly. The zipper is a royal pain as it constantly gets snagged on the insulated draft guard, until I cut them out. Not even sure why the zipper needs a draft guard, never heard anybody complain about a cold shin? I purchased a set of XL gaiters, they are very snug around the calves, compared to my friends size Large, it seems the XL sizing only applies to the boot area.
I have worn many gaiters over 15 years of mountaineering from Bolivia to Alaska & Iceland, I have never worn a more tailor made comfortable gaiter. I especially like how easy they are to put on & take off, this is a big deal when you are really tired from a long day on the trail or at altitude. A virtually bombproof design!