Designation:F2568−06(Reapproved2012)AnAmericanNationalStandardStandardTestMethodforMeasurementofSleepingBags1ThisstandardisissuedunderthefixeddesignationF2568;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThemeasurementsintroducedinthistestmethodarefortheinternalgirth,internallengthandwidth,andexternallengthandwidthofsleepingbags.TheexternallengthandwidthmeasurementsorinternallengthandwidthmeasurementsapplytolengthandwidthmeasurementsrequiredforstandardizedBeddingLabels.The“girth”(thatis,internalcircumference)ofasleepingbagreferstothetotalinternalcircumferenceatspecificlongitudinalmeasurementpointsofaclosedsleepingbag.Itisaphysicaldimension/measurementusedforspecifications,design,andqualitycontrol.Girthinandofitselfisnottobeusedtopredictthermalpropertiesofasleepingbag.1.Scope1.1Thistestmethoddeterminestheinternalgirth,theinternallengthandwidth,andtheexternallengthandwidthofasleepingbagunderastandardizedmeasurementmethod.1.2Themeasurementusesaphysicalmeasurementmethodapplicabletoanylocationwhereaflatlevelsurfaceisprovided.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.Terminology2.1Definitions:2.1.1bookends,n—twomoveablepanelsontheexternalmeasurementapparatusthatslideinandoutonthetwoaxisofthesleepingbag.2.1.2foot,n—thatendofthesleepingbagdesignedforthefootofthehumanbody.2.1.3girth,n—totalinternalcircumferenceofaclosedsleepingbagasmeasuredwhilethebagislyingflatonaflatlevelsurface.2.1.4head,n—thatendofthesleepingbagdesignedfortheheadandneckofthehumanbody.2.1.5length—seebelow:2.1.5.1Opti...
