On Sale. Therm-A-Rest Fitted Sheet DECENT FEATURES of the Therm-A-Rest Fitted Sheet Next-to-skin comfort soft, brushed polyester feels great against your skin Create your comfort snaps mate with the Tech(TM) Blanket or Ventra Down Comforter or with another mattress-and-sheet combo for a double bed Easy to use: elasticized hem and bottom straps fit easily over your mattress sheets are machine washable The SPECS for Medium Dimension: 20 x 66in. / 51 x 168 cm Weight: 6 oz / 170 g The SPECS for Regular Dimension: 20 x 72in. / 51 x 183 cm Weight: 6.5 oz / 181 g The SPECS for Large Dimension: 25 x 77in. / 63 x 196 cm Weight: 8 oz / 225 g The SPECS for Extra Large Dimension: 30 x 77in. / 76 x 196 cm Weight: 11 oz / 312 g