This invention relates to materials having {HEAD ~ a textured surface} and to {TAIL ~ methods} for producing such products 
This invention relates to materials having { HEAD ~ a textured surface } and to { TAIL ~ methods } for producing such products
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH