... taupe, mink, chocolate brown, powder blue, smoke blue,periwinkle, navy and black. Fitted sheet fits 13" or 17" thick mattress. Duvet covers ... available in the following items: - Twin Extra Long Duvet Cover and California King Duvet Cover. - Twin Extra Long Fitted Sheet; ... % Egyptian cotton. Egyptian cotton is an extremely soft, sensuous and comfortable fabric. Fitted sheet fits up to 17" thick mattress ...