They feel perfect, almost like i'm running in my socks but with cushions on my feet. They are very light, lighter than i expected, but the soles seem durable enough. The light feel is a real breathe of fresh air compared to some trainers i've used before. I'm no expert in running, just do a gentle workout every few days, but compared to other trainers i've had my feet feel more stable. I don't get that funny feeling like my feet want to roll sideways instead of stay flat. The size 10 fit perfect even though i usually get the 10.5, lots of room for my toes whereas often trainers aren't quite wide enough and rub into my little toe these are just right.