Two materials of yarn

There are basically two groups of fibers: 1) Natural fibers, consisting of animal and plant fibers 2) Man-made or manufactured/synthetic fibers. The following I’ll take a introduction of two types of fibers

Camel Family (Alpaca/Llama/Camel/Vicuna)

Yarns made from the fibers of these animals are very soft, lustrous, lightweight and warm. Alpaca is often used for the manufacture of warm, luxurious apparel. The down hairs of the Llama will produce a soft yarn also suitable for the manufacture of apparel. Camel hair is from the extremely soft and fine fur from the undercoat of the camel. Camel's hair can be used alone but is most often combined with fine wool for over coating, top coating, sportswear and sports hosiery. Vicuna is the world´s most valuable fiber. Vicuna is small and wild and belongs to the Camel family. It yields the finest animal fiber in the world. This fiber is rare and very expensive.

Wool

Wool is a natural fiber made from the fleece of sheep. Talk about wool and it conjures up a picture of cozy warmth. However, wool is not uniform among all sheep. Sheep live in a wide variety of climates and conditions, and develop their wool to suit the conditions under which they live or are bred. Today there are different grades of wool for different uses. There are coarse wools for carpets, soft fine wools for undergarments, highly crimped wools for bulky woolen yarns, wools with very long fibers for strong fine worsted yarns - a wide range from which the textile manufacturers can choose for a specific product like hand knitting yarn. The most valuable of wools is Merino wool. Merino wool is a very long staple, extremely fine wool from the Merino sheep. Merino wool, particularly when twisted into a worsted yarn, is smooth to the skin. The fine fibers are soft, and the long staple gives fewer ends, reducing any irritation from loose ends. Wool and knitting wool yarn is popular in the manufacture of clothing and home furnishings as it is warm, resists wrinkle, is lightweight and durable, absorbs moisture, is flame resistant, and has a natural stretch and elasticity.