TUSA’s BCJ-4000 — the Soverin — is made of 500 Denier Cordura nylon and is loaded with features. The Ultimate Stabilizing Harness uses strategically placed rails to hold the tank in place. The Independent Harness System isolates harness from air cell for better comfort and stability at depth. And the Waist Support System integrates the shoulder harness with the rear stabilizing plate and cummerbund to reduce the load on the hips. The Soverin provides lots of padding on the shoulders and an excellent back and lumbar pad, yet the BC has no inherent buoyancy. Four cargo pockets and some good-sized D-rings are provided for carrying extra gear. Bottom Line: In recent ScubaLab BC tests, the Soverin earned some of the best scores in comfort, stability and valve operation.