Linen is the highest frequency fabric. It promotes healing in the body, focusing on the energetic field, it is an antibacterial fabric, is hypoallergenic- so perfect for those of us who deal with allergies, and is super breathable!My husband is a very sweaty sleeper, and these are sweat test approved! I was worried they were going to feel scratchy but to my surprise, they are very soft- I hear they get more soft with every wash! LTKHome