This is very strict, for those frisky little slaves like me and you!
It starts with a 4" tall, locking posture collar that fits necks from 14" - 17" in length. Attached to that is a wonderful muzzle with a double-zippered mouth cover. You can unzip it a little, stuff something in as a gag and zip it back up! The two zippers meet in the middle, so you can even stuff an inflatable gag in and let the pump tube hang out. (Not included.) Imagine the possibilities!
The Severe Restriction Mask & Posture Trainer has six different head straps for a remarkably strict experience. The strap that wraps around the top of the head fits from 20" - 26" in length and makes sure the two straps criss-crossing the face and holding the muzzle firmly in place are anchored firmly.
Another strap over the top of the head keeps everything held up tightly and very securely. There's simply no way to get these straps pulled off, rubbed off against the bedspread or floor...well, you get the point.