The matraasi ọzọ ngwugwu ụzọ. Nke a bụ vacuum compress ma tụgharịa n'ime igbe. Uru nke ụzọ a ọ bụghị naanị nwere ike ịzọpụta ohere kamakwa ire ahịa ka ndị ahịa ọzọ convenient.Mgbe akpọrepu matraasi ga softer tụnyere ngwugwu nke mkpọ na osisi pallet n'ihi na osisi pallet matraasi ga-eku ka matraasi n'akụkụ ike.