The Hollis CRIB Custom Single Tank 35 Wing Package is a backplate and wing system designed for single-cylinder diving where additional buoyancy capacity and stability are required. Built around the Hollis ST 35 donut-style wing, this configuration supports divers using heavier exposure protection, increased weighting requirements, or cold-water environments while maintaining a streamlined underwater profile. The system combines a modular CRIB custom harness and backplate platform with a durable wing assembly intended for consistent buoyancy control and trim performance.

The ST 35 wing provides approximately 35 lb (16 kg) of lift and uses a donut-shaped bladder design that allows air to move freely around the wing for balanced inflation and improved horizontal positioning in the water. The outer shell is constructed from abrasion-resistant 1000D Cordura, paired with an internal urethane bladder for gas retention and long-term durability. The design supports efficient single tank buoyancy management while reducing excess bulk commonly associated with jacket-style BCD systems.

Integrated into the CRIB custom harness system, the package offers adjustable webbing, stainless steel hardware attachment points, and a structured backplate interface for secure cylinder mounting. The modular configuration supports cam band attachment and compatibility with a variety of single tank setups. Hose routing is streamlined to reduce drag and improve overall in-water organization, particularly for recreational, advanced, and technical divers using a single cylinder configuration.