The Philadelphia cervical collar is a two piece collar which has a front piece and a back piece and is held together by Velcro straps. The collar is used to support your neck bones and ligaments and reduce any movement that may further damage your neck.
It's important to wear your surgical collar properly to get the maximum benefit. A good collar should decrease motion but not cause discomfort, so let your doctor know if your collar is uncomfortable. The collar should remain on at all times until advised by your doctor. You may require some assistance to change the collar.