In addition to replacement soles, you can also find replacement shells available for KJ-XR3 and KJarmstrong XR models. These replacement shells are designed to fit these specific models, including compatibility with older XR series models. It is important to note that when replacing the shells, both upper and/or lower shells should be replaced together to ensure proper fit and functionality. By offering replacement shells, Kangoo Jumps provides a comprehensive solution for maintaining and renewing the outer structure of your KJ-XR3 and KJarmstrong XR rebound shoes, extending their lifespan and performance.