40th Birthday gift, Anniversary gift, perfect for a 40 years completion of a friend, sister, mother, father, grandparents, colleague, boss. Material: 5% Spandex, 15% Cotton, 80% Polyester Simply The Best 40th Socks for Daily Wearing or Wedding Party, Opening Ceremony, Anniversary Celebration, Graduation, Sports, Travel Commemoration, Business Gifts, Employee Benefits, Holiday gifts and so on. One Size Fits to all ( UK 4-11 ).Machine Wash. Great novelty gift for a 40th birthday. Let your loved one know that they are simply the best!