Heavy Exercise Band Set: Special Heavy Black Bands are the sixth of eight levels of resistance and great for rehabilitation and higher level resistance, they offer 3.3kg. resistance and 25% increase from preceding color at 100% elongation and 10.2 lbs. at 200%, each roll measures 
TheraBand Resistance Band Loops are an effective and efficient way to strengthen the gluteus Medius, a muscle often neglected by runners and/or athletes. This product is the actual choice of Physical Therapists and other medical professionals in the sports medicine community. TheraBand Professional Latex Resistance Band Loops provide continuous loop elastic bands in the same colors and resistances as authentic TheraBand System of Progressive Resistance. The 2" wide loops can be used for a variety of applications particularly lower body exercises to increase strength and balance. Band Loops eliminate the need to tie traditional bands, thus prolonging life and reducing additional wear.