The RZ3 improves upon the previous generation's aero frame bottle design, not only does it comply with UCI regulations, but also offers an improved overall shape.
Compared to the RZ2 the RZ3 has a lower profile in order to make it a bit easier to install
RZ3 also optimizes the water bottle cage, allowing you to to take out the water bottle with ease.
Opaque for easy viewing of contents
Soft material that is easy to squeeze
BPA free
Injection Composite Cage Mounts to any standard bottle cage bosses