In reply to NottsRich:
There is also a synthetic fill SynMat UL available in a variety of sizes/warmth ratings at a cheaper price or the DownMat UL is available in other sizes/price points:
Down Mat UL 7 XS 120x52x7 £145 rrp
Down Mat UL 7 S 163x52x7 £175 rrp
Down Mat UL 7 M 183x52x7 £190 rrp
Down Mat UL 7 LW 197x65x7 £215 rrp