I think this is impossible to find. I can only find some blankets that are linen blends which always have the backing material (the material that you actually sleep under that is in contact with your skin) as 100% cotton. I purchased a Casaluna Linen Blend Duvet Cover and it is great. It looks so beautiful and it really does look high end (HINT: it is not). However, for me it is comfy only when I flip it to the linen side down. The cotton just gets too hot. And the damn this sheds, pills and creates a TON of lint. I could honestly fill up a garbage bag with how much lint has come off of it. After washing, there are fuzz balls everywhere, all over it. After drying..... they are still there yet the lint trap is full and I even clear it out once midway thru the dry. I thought maybe it would slow after a couple washes but nope! I am well over 10 washes and still nonstop. The single most frustrating/annoying piece of bedding in the world. Okay. Rant over. But before I stop, DO NOT BUY THAT PRODUCT! lol. I love the feel of the linen side. I have Parachute linen sheets and I love them so much more than cotton. Now I am looking for any sort of 100% linen blanket that isn't so damn expensive. In reality, I will likely just have to bite the bullet and pay for the quality. I'm already convinced it is BIFL so I should just get over it and stop being a cheapass ;)

With that.... does anyone know of a king size 100% Linen blanket of any sort that is under $200?!?!

This one intrigues me. I know it is the blend but it may be worth a shot. Just wondering if the backing is a low thread cotton making it more breathable than the Casaluna sateen weave: https://www.target.com/p/chambray-yarn-dye-stripe-duvet-sham-set-threshold-153/-/A-54164614?preselect=54138089

Also for reference of the Casaluna and what NOT to buy: https://www.target.com/p/heavyweight-linen-blend-duvet-pillow-sham-set-casaluna/-/A-79148407?preselect=78622868#lnk=sametab