The geometric, dimensional, and flattering construction hosts three strong, welded O-rings that make for perfect attachment points for play and is fantastic for layering with other narrow-band collars.

Hydra is speculated to have originated from debris expelled by a major collision between Pluto and another Kuiper belt object, similar to how Luna is theorized to have formed.
 
Model wears size S. 
Mannequin displays size S.