This is a fully fitted grounding / earthing bed sheet for whole body grounding while sleeping. It is a 100% cotton with soft, yet durable conductive silver fibers woven throughout the material – in total each sheet contains nearly 1/3 mile of silver. The 'King' size will fit a mattress 152cm x 203cm (60" x 80"). This size is known as 'Queen' in the US, Australia & New Zealand. Colour is natural cotton (off-white).