Birkenstock Twist ABS Anthracite Cotton
Cozy, cozy! This organic cotton sock has a dense but not thick, nubby feel with wide ribs and a top that can be up or cuffed. The soles have non-skid 'dogbones' that look like the botton of your Birkenstocks. Nylon and lycra are added for strength and stretch and to help with shape retention.
88% organic cotton, 2% nylon, 10% lycra