Product Specifications & FeaturesMaterial: Typically constructed from multi-layered natural latex rubber for uniform elasticity, maximum durability, and structural longevity.Dimensions: Standard long-loop dimensions generally measure 2080 mm in length (flat loop circumference) with a 4.5 mm thickness.Resistance Level: Purple is widely categorized by fitness manufacturers as a Medium to Heavy resistance level (typically offering around 35–85 lbs or 15–40 kg of tension), making it ideal for both intermediate strength work and assisting with bodyweight pull-ups.