Purchased these December 2019 in size Small. I wear a size 7 and really wanted them to work, but they're just slightly too small for me. I don't think I've ever actually taken them out camping overnight; I've just worn them around the house maybe 10-20 hours total trying to stretch them out. They have some dust on them from sitting in the closet for almost 2 years, but are otherwise in perfect condition.
Here's a link to the product: https://40below.com/product/40-below-camp-booties-synthetic-insulated/