Bamboo

Bamboo yarn is made from the pulp of the bamboo plant. Using the same process that makes rayon, fiber produced from bamboo pulp is broken down into cellulose particles, polymerized, and then manufactured into soft, smooth fibers of various sizes. 

Fabric made with bamboo yarn tends to have wonderful drape, and bamboo is frequently considered to be next-to-skin comfortable, wicking away moisture. This fiber is suitable in just about all weather.