Lightweight, compact and portable, the tubing exerciser helps perform strengthening and conditioning workouts on-the-go, even in your hotel room! Continuous tubing loop has two padded ankle/wrist cuffs. The exerciser is preassembled and has a circumference of 35". CanDo is licensed to use the Thera-Band color sequence so resistance level is easily identified. The tubing with cuff exerciser is available in 7 levels of resistance for progressive exercise and 3 lengths to accommodate different needs. Levels range in order of strength from least to greatest resistance: tan, yellow, red, green, blue, black, silver. Length represents length of tubing from end to end when unit is laid flat and is taut. CanDo low powder exercise tubing is made of natural rubber latex, which may cause allergic reactions.