The result is a slightly taller and stretchier stitch, making it ideal for ribbing, lightweight garments, and textured designs. Yo, insert hook into next stitch, pull up a loop so that you have 3 loops on your hook Yarn over slip stitch in the back loop only by working your yarn over slip stitch into the back loop only, you will create the lovely tight rib as you go up and down your rows.
What is Yarn? | IM&D
Yarn over slip stitch, aka half double crochet slip stitch, simply crochet this stitch in each row in the back loop only (blo)
You can see how it creates this beautiful knit look texture that also has a nice stretch.
The half double crochet slip stitch is great for any time you need a stretchy fabric Half double crochet slip stitch (hdcss)