The #0 Orange band provides our lowest level of resistance and is great for light stretching, warming up, rehabilitation and shoulder activation. Bands #1 & #2 are best for general conditioning, rehabilitation, stretching, jumping, speed training, aerobics, and for lifters as assistance for the upper body to increase the resistance for bicep and triceps. Either band is great for beginners and light weightlifters. Both can be used to safely increase the intensity of a workout without adding additional weights to a bar. For the stronger lifter, they will add considerable resistance to bicep and tricep exercises. Bands #3 & #4 can be used by stronger benchers, and with exercises involving the lower body, calves, quads, hamstring and glutes. Large and X-Large Bands (#5 & 6) are usually used for obtaining maximum resistance with squats, deadlifts, leg presses and shrugs. SPECIFICATIONS Thickness: 4.5mm Length: 41" Material: 100% Natural Latex and over 99.9% free of soluble proteins (latex allergens) Number of Layers: 15 Sold individually unless otherwise specified TENSIONS #0 Orange: 1/4 in. 2-15 lbs. #1 Purple: 1/2 in. 5-35 lbs. #2 Red: 13/16 in. 10-50 lbs. #3 Blue: 1-1/8 in. 25-80 lbs. #4 Green: 1-3/4 in. 50-120 lbs. #5 Black: 2-1/2 in. 60-150 lbs. #6 Yellow: 3-1/4 in. 80-200 lbs. #6.5 Gray: 3-1/2 in. 115 - 290 lbs. #7 Orange: 4 in. 120-300 lbs. 41" BAND TENSIONS FOR FOOTPLATES (lbs. per inch) To use this table, start by measuring how far the band stretches — this is the difference between the starting and ending positions. For example, if the band starts at 10" (point of first tension for double layer 41" bands) and ends at 34", it has stretched 24". Multiply that stretch distance (24") by the band's pounds-per-inch (PPI) rating to calculate the tension. If there’s no stretch, there’s no tension.For example, if you're deadlifting with a 41" #3 band that is doubled under a footplate and has a PPI rating of 5.38, you would calculate the tension as:5.38 × 24 = 129.12 lbs of tension.Read more about our tensions HERE!