The present invention includes {HEAD ~ a mattress} having a fluid based center portion encapsulated by a stablizing visco elastic polyurethane covering adapted to prevent {TAIL ~ lateral or longitudinal movement} while a patient is disposed thereon 
The present invention includes { HEAD ~ a mattress } having a fluid based center portion encapsulated by a stablizing visco elastic polyurethane covering adapted to prevent { TAIL ~ lateral or longitudinal movement } while a patient is disposed thereon
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH