FITT Cube Resistance Bands Set Tone and strengthen your upper body, or increase your flexibility with Pilates-like movements with these 7kg resistance bands. Simply clip to FITT Cube using the carabiner clips. This product is covered by our 30 Day M Tone and strengthen your upper body, or increase your flexibility with Pilates-like movements with these 7kg resistance bands. Simply clip to FITT Cube using the carabiner clips. This product is covered by our 30 Day Money Back Guarantee (Terms & Conditions Apply).