If you havent used essential oils before, do some research and test small amounts to see how you like it and how your skin reacts. But for me, I use it to hang my jiu-jitsu gi to air-dry in a corner of my living room. My grandson like thatvthey are easy to slip on and off. If they were of better quality I would give this product a better rating. Oh, and the mute button works as intended. My biggest complaint is the use of the dial on the airpod max which is very tough to use with these covers. The information on how and where humanity received this amazing knowledge is described on page 8, 3rd and 4th paragraphs:"Atreya addressed the king of Devas, "O monarch of Devas, you not only reign over the heavenly spheres but also over all the three planetary systems. Both shoes are the same. A bit spendy so even though its good quality I marked off one star for value. Perhaps, I am inept, but I regularly trip when wearing flip flops.