Joerns XTB-0842 Mattress Length Extension Bolster with Fire BarrierExtended Mattress Coverage Where You Need It The 8" 42" Mattress Length Extension Bolster with Fire Barrier is designed to extend the usable mattress surface at the foot end of the bed when additional length is required. It helps create a more continuous mattress area and includes an integrated fire barrier. This bolster is intended for use with compatible Joerns UltraCare and EasyCare beds. Compatibility Joerns UltraCare Bed Joerns EasyCare Bed