The vented kidney belt offers a wide range of adjustment
Here is the KR-1 with the KR-TB Tailbone protector installed (sold separately)
The shoulder straps can be removed easily so you can install the Nucleon KR-C chest protector harness
Pic of KR-2 with the Nucleon KR-C Chest Protector Harness (sold separately). KR-1 attaches exactly the same.