Women's Invisible Yoga Socks in Organic Cotton, Comfortable, Breathable and Non-Slip. These yoga sports socks help improve balance and stability thanks to their non-slip technology. They don't slip on your feet, they are soft, breathable, comfortable and durable during training. Material: 94% Organic Cotton, 3% Polyamide, 3% Elastane. Size: 35-40. Sold in packs of 12 assorted multicolored pieces.