Strength Bands Strength Bands are an incredible versatile tool for adding resistance to stretching, lifting, and bodyweight training exercises. A higher quality band does not exist. Ideal for assisted pull ups and dips. All bands are made of 100% natural latex through a continuous layering process to ensure long life. All bands are 41" in length and 3/8" thick. Six different widths provide a range of resistance levels. Red – XX-Light – ½" Wide Primarily used for adding resistance to stretching exercises. Resistance is 5 – 35 pounds. Purple – X-Light – 1 1/8" wide Good choice as a general use band and a specifically for adding resistance to people under 140 pounds during walks, high knees, or sprints. Resistance is 25 - 80 pounds. Green – Light – 1 ¾" wide This band is also a good size for general use and for adding resistance to people from 140 to 200 pounds for body movements. Good choice for pull up training. Resistance is 50 – 120 pounds. Blue – Medium – 2 ½" wide For use getting started on training for bodyweight pull ups and adding resistance for elite athletes and people over 200 pounds. Also a good choice for adding increment weight to power lifts. Resistance 60 – 150 pounds. Orange – Heavy – 3 ¼" wide Primarily used for adding weight to power lifts. Resistance is 70 to 175 pounds. Black – X-Heavy – 4" wide The BIG DOG band for power lifts. Resistance is 80 to 200 pounds.