Opal Regenwald 21 is a self-striping 4-ply sock yarn made of 75% superwash virgin wool and 25% polyamide. Inspired by rainforest and nautical themes, each skein features vibrant, auto-striping colors. A portion of sales supports rainforest conservation through Rettet den Regenwald. Machine washable and ideal for socks, accessories, and lightweight garments.