RFitness Furinno RF1506 Professional 41-Inch Long Loop Stretch Latex Exercise Band Professional strength - highly durable with superior tearing/snapping resistance Versatile, adaptable to multiple fitness levels from beginner to advance level Long loop can be used independently, Doubled up, or stacked Light weight and perfect for travel. PVC travel pouch included RESISTANCE in lb-force: Yellow - 6.8 to 12.7 lbs; green - 11.5 to 20.9 lbs; blue - 16.2 to 29.8 lbs; Red - 21 to 38.6 lbs