Larasoft steam eye mask (lavender)sleep quickly, sweet dream Adopting natural provence lavender extract essencial oil, acent from lavender penetrates into body and makes people feel comfortable and relaxed.Steam heats about 20 minutes and deeps into eyeside to relieve headache and stress which will help you sleep well. Larasoft steam eye mask adopts advanced spontaneous heat controling technology.On the inside of eye mask, metal powder touchs water in the air and produce heating element.Water evaporates and produces fine and warm steam which maintains constant temperature at about 41.5 degrees celcius warm.This steam can soften skin and relieve fatigue and lasts 20 minutes above. About 20 minutes scientific heating time According to features of eyes skin, the best heatin time is about 15-20 minutes. Delicate detail and comfortable pasting According with ergonomic design, dermotropic material, fit eyes comfortably and perfectly. 41. Low-constant temperature technology. Produced in korea , export center in shanghai china.