These exercise bands are made with premium latex and have generous length (5 ft) to fit many exercise needs. Set includes: 1 Low Strength Green Band. 1 Medium Strength Yellow Band 1 Heavy Strength Red Band. 1 Heavy Duty Door Anchor. Allergy warning: Bands contain Natural Rubber Latex (NRL). Do not use if allergic to latex. Zensufu (tm) is a registered trademark and protected by copyright and trademark laws under U.S. and international law. All rights reserved.