Review on Get Fit With BERTER Resistance Bands For Legs And Butt - Non-Slip Fitness Booty Loop Bands For Intense Workouts! by Wayne Burkett

I've been using smooth latex bands for years, and they've been ok. Eventually the latex breaks down and the band breaks. Berter states these are made of spandex, latex, nylon, and cotton. To me, that composition give the bands (3 different sizes are included) more heft (they weigh more than the plain latex bands) and their extra thickness and rigidity prevent them from rolling up your leg or arm. The band surfaces are not smooth, so they tend to stay in place. it's rough enough to provide some "grip", but I didn't find them uncomfortable. The three different sized bands provide opportunity for a wide range of uses in a workout routine. I'd recommend them.