Very high quality product. This is my second set of Black Mountain Resistance Bands; and by far my favorite of the two. The bands being adjustable resistance (Adding more than one weight band for more strenuous exercises) are perfect for my workouts. The ankle strap allows the addition of several exercises that couldn't be achieved with free weight dumbbells. The door strap provides a single point of resistance for great pulling and pushing exercises- as well as lower body workouts like squats.