Net No Knot No Seam No Slip All Stretch Easy Over Head Sleeve Design The New ProSport Essential Hairnets have NO seams, No knots and No Slip. They are made with a heavyweight all stretch mesh that is washable and for all hair types and lengths. This hairnet is a sleeve design you pull over your head that keeps all the hair contained for a smooth finished look. Made specifically for the equestrian with a narrow head band for a clean sleek look. One size fits all.