I love leg warmers. A perfect solution to days that start out cold and turn warm. But, I 've had a couple different brands and follow the tricks of rolling them over under bike shorts. I have had PI, Performance, DeFeet brands. Some are slightly better than others, but eventually the grips fail and down they fall. So, have you found leg warmers that stay intact. Do they eventually fall with exertion. Which brands have you been the most pleased with.