BCR® Cleanroom socks provide the next level of cleanroom foot health and operator comfort during regular and extended wear. They are engineered with 96% nylon and 4% Lycra microdenier technology. This technology and protection does not diminish with laundering. The micro denier technology provides the sock with superior cool feeling and comfort. Because of the enhanced wicking function, contact discomfort associated with wearing regular cotton or polyester socks is greatly reduced.