What type of neck brace is the best for stretching neck muscles?

Hello everyone.I am looking for a neck brace(Cervical collar) to relieve pressure and open up the spinal vertebrae for 20-30 minutes.I think that it is better than static stretches. I don't think that cervical collar is long-term fixer but it releases neck muscles the best way to achieve the best activation on posture-strength exercises.There is a two type of cervical collar,soft and rigid.Which one should I buy?

from Bodybuilding News Updates https://forum.bodybuilding.com/showthread.php?t=175926321&goto=newpost
via IFTTT