Naha chick 3 I must precise that this is the first time that I use insoles to correct my problem with flat feet. So I cannot compare them much to other similar products.However, I tried them for a short walk and I felt a bit of difficulty in keeping them at the right place after putting my shoes on/off. Maybe a full shoes length type would be more comfortable.They feel much harder than I had imagined but again, it might be a normal thing (cannot compare since it is my first time having insoles).I will use them for a month or so and reupdate.