Premium quality materials: cotton 67%, nylon 26%, polyester 4%, polyurethane 3% Size: standard US SIZE that fit socks size from US 9-12(shoe sizes 6-11) Care: Machine wash, but Recommend gentle hand washes with cold water and no tumble dry, for these socks may shrink at high temperature Long-lasting/ Breathable: Keep feet dry and comfortable all day long For all occasions/Colorful & Unique design/Perfect for the gift: for your beloved's birthday, anniversaries, Father's Day, Christmas, etc