"The DYNA-BAND© are colour coded according to their strength of resistance catering for all abilities and levels of fitness from the mature exerciser to the fit young male/female.
Pink - Light Strength - For after injury the mature exerciser & young sporting athlets
Green - Medium Strength - For beginners, new to resistance exercise & sports warm ups, agility & flexibility training.
Purple - Heavy Strength - For those used to resistance exercise, Excellent for increasing sporting speed and endurance
Grey- Extra Heavy Strength - For the strong and athletic, can build and strengthen muscles
Each Dyna-Band© come with a well illustrated and easy to follow instruction booklet"