Bunk bed
Bunks are commonly seen on ships, in the military, and in hostels, dormitories, summer camps, children's bedrooms, and prisons.A ladder or a flight of stairs leads to the upper bed, which normally features a railing to prevent the sleeper from falling off.The most common type is the standard bunk bed which has two same size mattresses stacked one directly over the other.Futon bunks can be used to save space in small apartments or rooms, because the lower bed converts to a couch for use during the daytime.[3][4] This makes loft beds an efficient use of small spaces by utilizing the entire vertical area that would otherwise be left unused.
Bunk Bed (radio programme)Clemenceaubed framehostelsdormitoriessummer campsprisonsU.S. Consumer Product Safety Commission using the top bunktrundle bedsperpendicularlyWayback MachineBeddingbed sizesBox-bedCage bedRope bedCamp bedCanopy bedDaybedFour-poster bedHammockHospital bedKang bed-stoveLit à la TurqueCharpaiMurphy bedPetatePlatform bedPolish bedSleigh bedSofa bedTrundle bedBassinetCradle (bed)Infant bedToddler bedBed sheetBed skirtCot sideFootboardHeadboardMattressesAir mattressCambodian matTick mattressMahjong matMattress padMattress protectorMemory foamOrthopedic mattressWaterbedBed basesBox-springBunkie boardStorage bedBlanketsAfghanComforterDuvet coverElectric blanketHudson's Bay point blanketLizhnykPatchwork quiltPhoto blanketSecurity blanketSilk comforterSleeping bagSleeved blanketWeighted blanketPillowsAcupressure pillowBamboo wifeBolsterContour leg pillowCushionDakimakuraEye pillowOrthopedic pillowSpeaker pillowThrow pillowBed warmerNightstandBlanket fortsleep disorderssleep cyclesRapid eye movement (REM)Quiescent sleepSlow-waveBrain wavesAlpha waveBeta waveDelta waveGamma waveK-complexMu rhythmPGO wavesSensorimotor rhythmSleep spindleTheta waveAnatomicalBruxismMouth breathingSleep apneaCatathreniaCentral hypoventilation syndromeObesity hypoventilation syndromeObstructive sleep apneaPeriodic breathingSnoringDyssomniaExcessive daytime sleepinessHypersomniaInsomniaKleine–Levin syndromeNarcolepsyIdiopathic hypersomniaNight eating syndromeNocturiaSleep state misperceptionCircadian rhythmdisordersAdvanced sleep phase disorderCyclic alternating patternDelayed sleep phase disorderIrregular sleep–wake rhythmJet lag