Protective sleeve for helper with a thick, soft bite is designed for training K9 service dogs and for participation in sports competitions, e.g. IGP. It can be used for both young and experienced dogs. The equipment absorbs impact force very well and adapts perfectly to the pressure and angle of the bite (minimizing the risk of dislocating the dog's jaw). Durable and lightweight materials have been used to ensure long service life. All parts are handmade with special care to ensure the safety of both the helper and the dog during training.