Tusa BB React BCDBB React BCD The BB React Back Float has a new release tank buckle and bladder shape as part of a revolutionized harness system. The new system holds weight closer to the body to improve comfort and stability, eliminating tank roll. Features New harness system React System. New Bladder Shape Design Unique bladder shape tapers at the shoulder, holding air in a way that improves posture and stability above and below water. Made with quick drying TPU