The short sleeve “JIM” is a bitesleeve without protection cap that doesn’t encourage the dog to shake the sleeve: the sleeve stays a “passive” object, because there is no movement in it. The dog will faster fail to shake the sleeve.
The bitesleeve is very good to teach the dog how to carry the sleeve around. When the dog sits down, the JIM bitesleeve stays very well in balance, because there is no cap to bring it out of balance. The JIM is delivered with a cover. You can also order the covers separately.
Note: this sleeve is only made for the left arm!