Estako Happy Wool 40% Merino Wool 20% Cashmere Type Polyamide 40% Acyrlic Fingering weight soft Knitting and Crochet Yarn . Each ball 1.76 oz (50gr) 191 yds (175 m). Recommended knitting needle size: 3 mm, 11 UK, 2-3 US / crochet hook size: 2-3 mm, 14 - 11 UK , B1 - D3 US . Merino wool is a type of wool that comes from the Merino breed of sheep. It is highly prized for its softness, warmth, and durability, and is widely used in the production of clothing, blankets, and other household items. Merino wool fibers are finer and softer than those of other breeds of sheep, which makes them more comfortable to wear next to the skin. They are also highly breathable, which makes them suitable for use in clothing for a variety of climates. Cashmere type polyamide yarn is a type of yarn that is made to resemble the soft, luxurious feel of natural cashmere wool. Polyamide is a type of polymer that is known for its strength, durability, and resistance to wear and tear. Cashmere type polyamide yarn is typically used in the production of knitwear, including sweaters, scarves, and other garments. It is also sometimes used in the production of other home textiles. CERTIFIED, DURABLE, AND ECO-FRIENDLY: The yarn is CERTIFIED as STANDARD 100 by OEKO-TEX to be FREE from Harmful Chemicals and Artificial Synthetics.