Strength rubber for strengthening arms and legs Laubr Sport "Light" strength rubber is a popular helper that will strengthen your arms and legs in an easy way. Work out in the comfort of your home or take it to the park for a morning workout. The strengthening rubber will bring you more effective options than ordinary exercises. EXERCISE WITH JOY! dimensions: 150 × 15 cm thickness: 0.35 cm material: thermoplastic rubber TPE difficulty: easy