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 a superior cool feeling and comfort. Because of the enhanced wicking function, contact discomfort associated with wearing regular cotton or polyester socks is significantly reduced.