I have plantar fasciitis and was looking for slippers with a firm sole and good grip. I also like slippers that I can put on without using a shoehorn or poking my toe in my heel. This slipper has everything I wanted and more. The insole offers excellent grip and is replaceable. Slippers have Velcro straps that can be used to adjust the fit of the foot. I am so impressed with the insoles that I ordered six of them separately to fit other shoes.