High-quality soft silicone ball make the product soft and doesnt hurt your teeth 
Double buckle clasp Design which insures the belt doesnt loosen or slip 
Smooth collar is not abrasive or rough and doesnt irrate the skin any more than you wish 
Adjustable belt holes can revise more than enough for head size 
Product parameter:Locking buckle,ball diameter:1.7'',full length:25'',adjust from 16'' to 22'