XDEEP NX Project - next generation BCD for double tanks contains:
-NX Project Aluminum backplate
-NX Project BC / wing
-NX Project DIR complete webbing harness 

Harness Sizes available
For divers less than 175 cm tall (S)
For divers 175 cm and more tall (L)

50 lbs of lift and reduced drag
PROJECT's optimized shape with minimal dead air spaces gives significantly less drag and superb lift.  
Straightforward and durable
The NX harness is a single, no break harness, completely failure proof.  
Easy access to the valves
The carefully designed upper wing helps with reaching the cylinder valves - improving your safety.  
Comfortable high stability harness
The NX harness distributes your equipment load evenly, the "V" shape crotch strap preventing sideways movement and enhancing comfort when scootering.