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