This set includes 100% recycled cotton socks made from "false cotton" and three colors of thread for mending and arranging. The socks come in four colors selected from Saredo's new standard "peli-tan". The set includes one color of the socks and two accent colors, for a total of three colors of thread. Collect them all and you'll have 12 colors! The recycled cotton is thick and loosely twisted, so it can be used not only for darning, but also for a wide range of knitting, wrapping, and craft materials. Darning, which was originally a needlework for repairs, can be enjoyed in a pop way as a charming decoration. This experience fosters attachment, which leads to a "kind" feeling of cherishing things.