Different resistance level to accommodate for progressive strength training levels: Yellow Band – Extra Light (6 LBS – 8 LBS) Green Band – Light (9 LBS – 11 LBS) Red Band – Medium (12 LBS – 14 LBS) Blue Band – Heavy (15 LBS – 18 LBS) Black Band – Extra Heavy (22 LBS) Contain: 5 x Color Resistance Band ( Yellow, Green, Blue, Black and Red ), 2 x Foam Handle, 2 x Ankle Strap, 1 x Multifunctional Bandage, 1 x Travel Pouch Perfect for yoga, pilates workout Easily creating over 30 different resistance Exercise the handles Bands are made of professional quality natural rubber latex Strong cushioned foam handles with zinc alloy clips and D-ring As we can see in the picture, the connection to the bands is specially designed, it doesn’t cause any damage to the bands, it’s more firm, more resistant and never break up!