I'm calling this the Robin's egg Towel set, because of the flecks of colors throughout the yarn, but it's simply done in single crochet stitches. It's designed for beginner crocheters, but sometime us more experienced crocheter want something easy to do and that's what this pattern is. Video and pattern links are below.
Single Crochet Dishcloth by Crafty Yarn Barn:
Quick & Easy - (No Sew) Towel Topper! by Creative Grandma: https://youtu.be/Cuqyrynk4sw