The [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extender[/words] I bought came with a foam tubbing that your slide your... I guess you can call it tourniquet. It always slipped off and the foam made the head of my dick really sore. I use as crazy as it sounds... toiletpaper. It provideds a tight hold and it's not direct contact with the rubber tube.
