These collars, like other collars, may have deep significance to the wearer or be a symbol of the status someone holds in their relationship. They may be worn for some kinds of play or as a way to engage in BDSM fashion.
More About Posture Collar
Posture collars may be used in conjunction with other posture training or on their own. Like most collars, they are found in various materials, including leather, rubber, PVC, metal, and more. They will often have a D-ring or O-ring on the front of the collar for a leash to be attached.