Nylon Spandex Imported COMFORTABLE FEET: Adds comfort while preventing blisters or chafing SNUG FIT: Made with a lightweight, thin, breathable fabric that conforms to feet NYLON/SPANDEX: Material blend reduces friction and skin irritation on the feet SPORT USE: Great for swimming with fins, running, biking, and other activities MULTIPLE SIZES: Small – Men’s 2-5.5; Medium – Men’s 6-9.5; Large – 10-14