Prevailing share of cotton fibres (98%) make the T-shirt very comfortable with goods sweat absorption. Conductive polyester fibres containing carbon particles (2%) create black strip pattern, which ensures conductivity in one direction only, so antistatic sewing threads are applied in the seams across the strips to ensure the conductivity in the other direction as well. The share of carbon is designed so that requirements of EN 61340-5-1 and EN 1149-1 Standards are met. Functional fibres are composed of carbon particles firmly embedded in the surface of polyester base, which fact ensures permanent antistatic properties of the product. This is the main advantage of this product compared with the other ones made of surface finished fabrics, whose antistatic properties fade after several washing cycles. Our products satisfy the requirements of mentioned Standards even after 50 washing cycles which is in practice well comparable with real useful life of such products.