This is my first attempt at making a CPAP hose sleeve. Even though this is a simple project I looked at some other similar projects to get ideas for how to go about it. I was originally thinking of knitting this seamlessly in the round but decided it would be easier for me to work this first one flat and seam it.
This yarn and needle combination swatched at about 5 stitches/6 rows per inch. I'm using Big Twist Sincerely Ombres in the Gray Denim colorway and 4.5mm needles.
The CPAP hose end caps are about 3.5 inches in circumference at the widest point and the main hose tubing about 2.75 inches in circumference with a length of 72 inches (6 feet).
Initially I cast on 15 stitches and worked in 2x1 ribbing for 24 rows/4 inches then switched to stockinette for the main body of the sleeve. But I decided I needed to add a couple more stitches to the sides to act as selvage for when I sewed the sides together to make the tube, so I ripped out what I had done and started over by casting on 17 stitches. The first stitch on each side would be a selvage worked in garter stitch. Again I did 24 rows/4 inches in 2x1 ribbing then switched to stockinette for the main body. I continued in stockinette (plus the selvage stitches) until the length measured about 68 inches, then I finished the other end with 24 rows/4 inches of ribbing.
To seam the length, without breaking the yarn I switched to a crochet hook, chained 1 and then single crocheted the length closed to form a long, thin tube. My thinking was in doing it this way it would be easy to "unzip" the seam and recover the yarn if I needed/wanted to redo this project later.