A firm pillow will work best since it’ll hold its shape better than a plush one.
A dress tie is more durable and will feel better to lie on than string, twine, or rope. If you don’t have a dress tie, try using a soft ribbon or narrow strip of fabric.
Try lying down on your side on the one-third section of the pillow. The tie should create spaces that comfortably fit your CPAP mask. If necessary, adjust the tie’s location to find the most comfortable position.
Trace out the areas that you’ll need to cut out to make room for the mask. Be careful not to accidentally mark your mask.
Carving cutouts for the mask on each side will allow you to comfortably sleep on both your right and left sides. If necessary, cut a space at the bottom of the pillow for your shoulder.
If the pillowcase fits too tightly, it won’t take the same shape as the contours you cut into the pillow.
Once you’ve selected your fabric, prewash it according to its care instructions.
If you’re using a sewing machine, try not to yank the fabric too hard to follow the curve. Focus on the area just ahead of your stitching needle and gently move the fabric with your fingertips to follow the curve. Leave the fourth side open so you can flip the pillow right side out and stuff it. [5] X Research source
