3MFT-3875RV-SB Size: Twin Features: -Cover can be zipped off for dry cleaning.-Comfortable stretch knit cover.-Designed specifically for RV and travel trailer use.-Open cellular structure channels heat away from body to keep cool and comfortable.-Made in the USA.-Twin: 3" H x 38" W x 75" D.-Three Quarter: 3" H x 48" W x 75" D.-Short Queen: 3" H x 60" W x 75" D.-Queen: 3" H x 60" W x 80" D.