The Mega is an excellent extension when we really want to up-size, turning my 5″ circumference into a 7″ around monster. The material is soft to the touch and stretchy. Very easy to apply by stretching it open. No need to use lube on the inside, though you will definitely want lots of it on the outside. Friction and suction locks it securely in place, even with a foreskin. The head has a firm rubber plug on the inside, wrapped in the soft material outside. We have tried other extensions that do not have the double density head. Either the head is too soft, like pushing in a big marshmallow, or the entire extension is too firm, making it difficult to put on and uncomfortable for the one taking it. The wife accepts all of the Mega’s extra 2 inches with a happy moan, while firmer sheaths will cause a disapproving groan. The only complaint I have is that to clean the toy properly the rubber head needs be popped out. It is not difficult just a bit of a pain getting it back in. Also, I don’t remember this being mentioned by the company and it isn’t obviously removable. Regardless, definitely gets a full mast salute from myself and the wife. Just a word of warning, though, these are durable but you need to treat with care. This is the third one I have purchased over the last several years. The first I left turned inside out to dry,and it split along the seam. The second lasted several years until I stored it with another similar toy and the two sort of melted together (my fault). Still, money well spent. (And super happy to find 3xtoys.ca so I can finally buy some adult fun from Canada without being robbed.)