High-resistance loop straps for strengthening the upper and lower body. Ideal for adding resistance to bench presses or deadlifts. Can also be used with pull-up bars, parallel bars, weight bars or kettlebells. For best results, store in a dark place and apply talcum powder from time to time.Available in five different versions:Purple: width 1.3 cm; resistance 7-15 kgOrange: width 1.9 cm; resistance 9-25 kgGreen: width 2.1 cm; resistance 11-30 kgBlue: width 2.9 cm; resistance 13-35 kgRed: width 6.5 cm; resistance 23-57 kgBlack: width 6.5 cm; resistance 30-80 kgLength: 103 cm