The Springy Boots are a weapon Gromit uses only in the First Boss in the game Project Zoo.
In the beginning cutscene before the first boss, Wallace invents the Springy Boots to make Gromit jump through the vent at the underground mine enterance, but he suddenly faces Feathers McGraw's drill along the many penguin robots. When Gromit uses this, he can jump high and he can avoid being hit by a robot. But if he times it perfectly, Gromit can use the boots against them.
THE SPRINGY BOOTS ARE WALLACE'S BOOTS. THEY BOUNCE UP AND DOWN.THEY APPEAR IN PROJECT ZOO.