This sleeve has a ribbed texture on the inside for added sensation! It is made from a slightly heavier weight material and weighs about 10% more than the mouth sleeves. The extra weight makes it a more durable sleeve and one that your cock will feel especially happy inside of! Cleaning instructions and compatible lubricants remain'the same. Make sure you pick up a toy cleaner and just give it a few sprays before use. Don't forget to store it in a ziplock bag filled with baby powder to extend its life! Enjoy!Size B: Girth 4-5.5 in (10-14cm)