Made of premium quality bamboo; %80 bamboo, %17 polyamide, %3 elastane. Imported from Europe. Helps control sweaty feet. Reinforced heel and toe prevent breaking, ensure last long. Lightweight, comfortable socks with comfort seam are perfect for everyday wear. Fits to shoe size 5-8 (stretched length 14-16 inch) & 8-11 (stretched length 16-18 inch). Machine washable with similar colors. For the best result, turn them inside out before placing in washing machine. Wash gently in warm or cool water (86??F max) with mild soap, careful to avoid bleach or fabric softener. Tumble dry on low setting.