This practical trundle makes the Oeuf Sparrow twin bed twice as useful! With the mattress (sold separately) the trundle makes an additional bed, ideal for sleepovers. Without the mattress, the trundle can be used to store clothes, sheets and blankets. Hidden wheels make the trundle stylish as well as easy to use. Features Meets all US, Canadian, Australian and European safety standards ; Hidden wheels are stylish and make trundle easy to use; GREENGUARD Gold certified; Sustainably produced in Europe in an FSC certified facility; Made of FSC solid birch and FSC Baltic birch plywood ; Finishes are non-toxic, water-based and free of VOC health hazards ; Made under European environmental standards ; Packaging made of recycled cardboard; Responsible recycling through licensed collecting facilities; Specifications Assembly required.; Slatted base means trundle is best for storing larger items; The Sparrow trundle is only compatible with the Sparrow twin bed (Item #3SPTW01 and #3SPTW02) purchased after August 1, 2010; Can hold up to 225 lbs; Birch finish fits our Universal Trundle Mattress size 38"W X 69"L X 4 1/2"H (please note this is not standard twin-size). Mattress Sold Separately.; All furniture sales are final;.