 The purpose of the study is to determine whether the application form of etheric oils camphor, cineol and menthol causes changes in the concentration of this agents in the exhaled air. The second aim of the study is to determine differences in the subjective convenience of the application forms. We will test an commercial ointment application vs. smart textiles. Smart textiles are new high-tech products with the unique possibility to combine the textiles with functional products e.g. pharmaceutical agents. 