Moisturisers contain humectants ( eg glycerine ) that attract water and keep it in the skin . They also contain emollients and are usually blended with oils then emulsified into a cream , which acts as a barrier against external irritants .

保湿霜含有能够吸收水分并保持皮肤湿润的保湿成分（如甘油），也包含润肤成分，并通常被混入油脂，然后乳化成乳霜，如同是避免皮肤受外部刺激的屏障。