I suggest using two worsted weight 100% cotton yarns together to produce a heavier fabric better suited to body scrubbing. My preference is for one solid and one variegated yarn but any two yarns will do. If the yarn is closer to dk weight, 3 yarns together will be fine.
This flower washcloth sachet is meant to be practical, not only decorative. I gave out about 20 for the holidays and they’re all in use and gushed over. The 100% cotton stays soft when wet and gives a thick lather with the soap in the sachet. Best of all, it will last for many years - just replace the soap bar in the sachet!
My sister loves that the wrist handle makes it much harder for her cub scout sons to lose when camping.