15% acrylic Hand Wash Only APPROPRIATE THICK & WARM! 50.4% Polyester, 17% Wool,15% Chinlon,15% Acrylic,2.6 spandex. The suitable proportions of wool provide these kids wool socks a otimal thickness, and perfect composition of superior softness and warm. It behave well at resits shrinking and curing when kids are in the activity. FLEXIBILITY & COMFORT! Wool clothing is natural heat-retaining and moisture-manageing.These wool socks are designed to be an ideal choice for girls and girls winter everyday wearing.Breathable features of wool fabric also provides dry, fresh feel in all seasons. SMOOTH TOE SEAMS & COZY! These girls seamless winter socks features hand linking boneless sewing toes,locking thread is very smooth and invisable.Reinforced cushioned heel built-in arch support for extended wear,creates a more comfortable fit on the foot. MUST-BUY ITEM! Great Value 6-PACK of Winter Wool Crew Socks For girls And Girls.Simple and cute color blocks patterns,classic all-match style.Cozy for wearing around the house,and great for outdoor activities and sports. NON-FADE COLORS GUARANTEE! Please note minor pilling of wool is possible and common but not quality problem. Recommend hand wash to ensure less pilling and deformation.