The Hanro Cotton Deluxe Sleeveless Nightdress is made of mercerized Pima cotton. Pima cotton is one of the strongest types of cotton and by mercerizing it it gets an even higher quality and thus a higher gloss, greater strength and better dimensional stability. The dress falls just above the knee and has a button at the front. The underside is finished with a slight curve. The dress is ideal to wear while sleeping, but also at home.