The waterproof Rufftex™ bottom keeps it from slipping around. Plush fleece top offers your pet soft comfort for napping. Hidden zipper pocket holds toys and more. Bed rolls up in seconds and is easy to carry with its built-in handle. Machine washable for easy care. Medium (dogs up to 40 lbs.): 25"W x 36"L x 1 ½" thick open; 12 ½"L x 8" dia. rolled. Large (dogs over 40 lbs.): 36"W x 48"L x 1 ½" thick open; 17 ½"L x 8" dia. rolled.