COLOR-CODED RESISTANCE: Package includes 3 color-coded resistance bands: yellow for light, red for medium, and blue for heavy for easy to increase difficulty and challenging workouts 4 FT. LONG by 4 INCHES WIDE: Our 4 ft. bands are flat and smooth latex construction MULTI-FUCTIONAL TRAINING: Achieve a different effect on a resistance band, fold them over for more tension, tie a knot for a loop band or take a couple wraps around your hands for a secure grip