Mattresses Foundations Bunkie Board Solstice Sleep Mainly used with bunkbeds this is an upholstered foundation that is about 2 inches thick Finish Color Gray or Tan Profile Height 2 Foundation Twin FS1006-5010 TWIN $49.00 Foundation TwinXL FS1006-5020 TWIN XL SINGLE $59.00 Foundation Full FS1006-5030 FULL $62.00 Foundation Queen FS1006-5050 QUEEN $68.00 Foundation King FS1006-5020X2 KING TWIN XL PAIR $119.00