This spa washcloth is made up of a variation of the wave stitch, in multiples of 4. You will be able to work this washcloth up in around an hour or less.
Stitches used: double crochet, slip stitch, single crochet, double crochet back loop only, and slip stitch back loop only. Follow along with my video if you need to see any of these stitches crocheted.