This is an all season incredibly soft and purely natural piece of garment. With bamboo's inherent property of moisture wicking and anti microbial fiber, this Tee is going to keep you feeling fresh in the hot summer noon and feeling warm & cozy in the fall and winter afternoons. Bamboo rayon fabric by itself is very soft and thin but by adding 30% organic cotton to this fabric the garment assumes body and valoure like rugged softness. Once you have tried this shirt on, you will be hooked for ever.