We have used their organic cotton sheets for years. These are our new favorites. So soft and cool.
I'm very pleased with this purchase. Too early to tell yet how effective it will be, having been only a few days. But this cover is very well made of soft material, and a tight zipper. It is easy to slip on. Mine is for a double bed. If all of the attributes built into the product and material prove accurate, it will be a very good purchase and well worth the cost. In any case it is much better than the old, shreddy, wrinkled un-zippered-in mattress-top covers that I have always used. My mattress is now entirely covered, zipped closed and fits the mattress well so there are no wrinkles under the top sheet.
I don't have allergies but I bought as a precaution. So I can't say it works but it's made well and now I have them on the guest mattresss as well as mine.