- Men's lamb leather jacket. Skull print on the back. Rough biker jacket design. Heavy zippers. The model is wearing a size L and is 187 cm tall. JACK & JONES PREMIUM The leather biker jacket is a men's wardrobe classic and this particular version is made from soft, lamb leather - you're sure to have this for years to come. And with the skull print, you're sure to stand out from the crowd.