Description Special size mattress for the River, Sparrow and Perch Trundle Bed. The trundle mattress will give your overnight guests a comfortable nights sleep on the trundle bed. Made from lightweight but durable medium-density foam, this mattress is non-allergenic and safe. The mattress is covered in cloth fabric with a cloth binding.  Dimension are 38"W x 69"L x 5"H Oeuf Trundle Mattress For River/Sparrow/ Perch