ToeSuit Mens Casual Invisible Patent Socks Worked Natural Low Cut 68% Cotton / 28% Polyester / 4% Polyurethane Item model number: IAS009 / Machine Wash or Hand Wash , No bleach , Tumble dry low Elastic No Show Liner Socks / Anti-Slip Heel Grip / Sewing for prevention of transform (warping) / Premium Cotton keeps your feet dry and comfortable / Made in South Korea Available in 3 pair pack, 5 pair pack and special muti color 4 pair pack Size variation is based on US Men's shoe sizes. Small (6-7), Medium (7-10) / Four colors in two sizes are available In the case of order that ships from Ohoo, (FedEx Priority / USPS) It usually takes around 5-10 days for arrival except for order fulfilled by amazon. Also, APO/FPO orders are welcome here.