Since it's spring in Colorado, yes despite the snow it is still spring, we thought we should talk about fibers that you wear in warmer weather.Cotton is great but it isn't the only wearable plant fiber. Fibers that come from trees and grasses are also great options. These include things like viscose(rayon) tencel and lyocell. Bamboo, linen, and hemp are other, more well known, plant fibers. These fibers all undergo a rigorous process to be made into a yarn that is wearable and gorgeous. Most of the time they are not machine washable although some blends are.