Buy Eterna Casual shirts from Michael Stewart Menswear.   The Finest 100% Swiss Cotton, All Shirts are Natural Non Iron. Only those that use the best raw materials can aim for best quality and offer it to their customers.   Only the best and ‘longest stapled’ cotton fibres are considered for the production of the fine Swiss cotton material.   That is just three percent of the global cotton harvest. Those that wear an eterna shirt or an eterna blouse appreciate the top quality.   The quality improvement to make it wrinkle free is already in the material. Afterwards it will always remain smooth. Wrinkles are ‘ironed’ away by the body heat of the person wearing the shirt or the blouse.