ENVIRONMENTAL AND NO ODOR: Using the green,non,new industrial fabric with good texture,soft handfeel and no objectal odor. SOFT HANDFEEL:good texture,soft handfeel,Suitable for thi hair,curly hair,straight hair and thin hair. NO DA(HARMLN): with soft & solid seln design,it is easy to remove it from head without stiin to the hair. NO SLIPPING:High elastic material is thi and durable that can keep the hair firmly and not easy to loose up. NO SNAGGING,BREAKING OR STRETCHING: Using the seln design,it is firm,well streching and better recovered,not easy to be broken and out of shape..