They help your feet, legs, hips & back, that’s a fact, good arch support that helps your entire body, my husband loves the support!These inserts are amazing. They fit in my casual sneakers and give me wonderful support.This is my second pair, the first lasting around 8 years of almost daily use. My legs and feet are not fatigued as when I wear very expensive custom orthotics. I love Birkenstock sandals and the footbeds give the same comfort. They don't take up too much space in the shoe and fit most casual styles.I love these. This is my second pair. The first lasted 2 years. I have very high arches, as in, if I make a foot imprint, it looks like the center of my foot is missing because it doesn't touch. Without these, my feet are in pain. These are fantastic because they turn any pair of shoes with a back into something I can now wear.Over the past 30years I have tried many orthotics and/or insoles. Nothing measures up to the Birkenstock ones. Super comfortable and offers exception arch support. If you have heal pain, this is the one to get. I purchased my 1st set of Birkenstock inserts in 1991. After a few weeks my heel pain went away. In 1997 I purchased another pair for a back up. Thru time they both wore out. In the past I have tried others but none measure up. Exceptional arch support. Feels like you are wearing a glove. Molds to your foot and no break in time needed. Highly recommended. 100% Customer SatisfactionVery happyI've used this type of Birkenstock insert for over 20 years....possibly as long as 25. I have at least a half dozen pairs two of which date to my first purchases of them in the 1990's. The oldest are so worn the blue cloth that gives them their name is gone entirely from the tops. All that is visible is the cork lining material which is slowly thinning at the heel. As they thinned I noted that they also became somewhat more flexible but they still get use in my least worn shoes and slippers. The arch remained intact. I have never seen the need to throw a pair away. The newer sets get switched between shoes all the time as needed. I have used them in styles of footwear ranging from slip-ons to hiking boots and though they are pricey their durability compensates for the initial expense. They have seen service in both long hours of standing at work as well as during many miles of long distance hiking. I am habituated to their feel after all these years and consider them essential now given that the typical pair of shoes these days comes with little or no arch support. When I put a pair of these in a brand new shoe it feels exactly like all the rest of the shoes that preceded it. I usually just insert and wear these on top of any padded lining already in any new pair of shoes but I suppose one could put them under those linings for a bit softer feel. That said--and though they are very stiff especially when new--it has never bothered me to have them in direct contact with my feet even for long periods of time. I regularly hike wet areas in which my boots and socks become saturated. Apparently these are entirely waterproof because once dried on my boot dryer they appear none the worse for wear. One pair has been through many such wet dry cycles and still shows no signs of deterioration.I've tried others but this is hands down the best product out there.Best insoles I have ever owned, I own 3 pairs. The first pair I bought over 20 years ago and they are still usable.Perfect fit, fast shipping, very happy A++Fits wellDidn't know what to expect from these. I'd tried the $500 custom made orthodics my doctor arranged for, they sucked. Then I found the Dr. Scholls custom fit series which worked better for a few months. These are much better then either. I didn't have high expectations for the cork? like material these things use but was pleasantly surprised. Fit is important with these in terms of where the ball of your foot sits, so make sure to follow the sizing directions properly. A bit expensive, but we'll worth it for flat foots.