Features the widest and deepest heel cup that offers maximum support and positions the soft tissue to help with natural shock absorption.
Durable viscoelastic closed-cell foam absorbs impact to deliver long-lasting comfort.
Top layer delivers long lasting odor control.
The flexible horseshoe-shaped heel cradle provides structure and stability to the foam layer.
Improves air circulation and breathability.
I have to agree with reviewer KAT -- these shoes provide so much more support for my flat feet compared to the orange or green Superfeets. Why I never discovered them sooner is beyond me! They fit well in my new Saucony running shoes (wide) and the comfort/difference is noticeable right off the bat. Looking forward to logging some miles in these.Show More Show Less
I was very very hesitant to buy the Flex because my coworkers didn't like them as much as their regular Superfeet..but I am here to set the record straight. I have the orange and the blue Superset (which I alternate on a day-to-day basis, and LOVE), but I am a strong advocate for the Flex..it has been the only Superfeet product that I have tried so far, that provide enough arch support for my insanely flat feet, and that keep my heels pain-free after 9-10 hours of straight standing. I got the flex max because I was looking for extra cushion, and it is so great, definitely my go-to pair. BEWARE though, the max does take up a lot of room in athletic shoes (it varies obviously on the brand of shoe) my toes felt a tad crammed in my Saucony running shoes, but they fit perfectly fine in my Brooks, so if possible, I would suggest trying them out before making a purchase. I am STRONGLY considering buying the 2 other Flex!Show More Show Less