Fitbotic Resistance Strength Band- Exercise Loop bands for Crossfit, Calisthenics, Pull Ups, powerlifting Weight Training/Lifting, gymnastics (#1 Black (3/4" x 41") 10-50 Lbs Highest Quality Material Black Band: 10-50 Lbs of Resistance/Assistance Bands universal for many activities and sports- From physical therapy to advanced sports conditioning Activities include but not limited to: Crossfit, bodyweight/calisthenics training, powerlifting/weightlifting, pull ups, gymnastics and more Used for resistance or assistance- the lighter the band, the less resistance and assistance- the heavier the band, the more resistance and assistance. Beginners and advanced can benefit from all size bands Great for overall wellbeing and healthy lifestyle. Injury prevention, physical therapy, conditioning, toning band and much more