When I was new to the bowhunting thing, I thought the rubber tube was just part of the deal. It finally poped me in the face (luckly while practicing). I tried that damned "Hind Sight", which is in the trash now, that got me through a hunting season. I bought a new bow and the Bow Pro suggested a "Tru Peep". It does not require a tube. I am extreamly happy with it.