From the website: WOMEN'S WATERPROOF BOULDER BOOT This upgraded Boulder Boot version is made with all of your favorite features like supreme flexibility, a zero-drop platform, and unparalleled packability, but now, it’s also waterproof! Product Details This boot still maintains the lightweight frame you’ve come to know and love from Lems — even though we’ve added a unique waterproof membrane, these puppies will still hit the scale at a featherlight 12.9oz. We also took some time to rethink the overall construction of this boot, and reinforced everything; from a thicker gauge thread to an overall stronger outer construction. And yes, before you ask, they’re zero-drop. Ready to roll through a river, plow through an ice pack, or anything else on your agenda? Good, because so are our Waterproof Boulder Boots, which keep your feet shockingly clear from clammy conditions due to a breathable waterproof membrane that stops water from penetrating into the boot, while still allowing the heat from your feet to escape. This kind-of-a-big-deal boot also utilizes a pre-treated leather upper, that can be reapplied with waterproofing wax/spray to help extend its water repellency. I bought these a couple years ago new from the website and only wore them a few times. They are very elvish. Thanks for looking!