The inner and outer layers are secured together, such as by sewing at the toe portion of {TAIL ~ each} to form {HEAD ~ the double sock} 
The inner and outer layers are secured together , such as by sewing at the toe portion of { TAIL ~ each } to form { HEAD ~ the double sock }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD