Wool & Bamboo Silk
Wool is one of the best yarns for making rugs. Being a natural fibre that feels warm and soft underfoot. Wool rugs do shed, and the amount of shedding depends on the origin of the wool, length of its fibre and diameter of the fibre and its processing into yarn. Wool has some fire-retardant qualities. Note that some people can be allergic to wool.
Bamboo silk is simply the name given to a rug made from viscose, a blend of viscose and/or fibre removed from bamboo stalks. As a fibre, Bamboo is growing in popularity due to it being a fantastic renewable resource.