Resistance: Green, pull strength 3.6-10.8 kg. The StrechCordz Modular Resistance Bands Set for variable swim strength training enhances your swimming power on land. The set includes a durable latex tube, handles, paddles, foot straps, and a corresponding storage bag. Due to the high elasticity of the resistance bands, the resistance does not increase as sharply during the pull. This makes the force curve ideally suited to that of swimming. The StrechCordz rope also features secure connections to the plastic components. Pull strengths: Green: 3.6 to 10.8 kg, Red: 5.4 to 14.1 kg. Package includes: StrechCordz resistance band, handles, paddles, foot straps, and a suitable storage bag in the respective pull strength.