anyone use superfeet flex thin in there hiking boots? looking to put them in my crispi nevadas but i dont want to raise my heel at all using like a green or trailblazer,
I've looked at them but dont use any. They are only 3mm thick but they also dont have much structure or support. Have you considered the Run Thin. It has a carbon heel cup like the Trailblazer series and is 4-4.5mm thick. Thicker but more structure and support.
Personally I use the Lathrop Synergy insoles in boots that lack the space to acommodate my Superfeet (Green, Orange, Trailblazer, etc.) They dont have the structure and support of my Superfeet either but the batwing design really does an excellent job of cradling your feet and reducing blisters. Pairs wells with boots that already possess the underlying anatomically correct framework. They aren't particularly thin or light though.
I always buy boots 1/2 to 1 size larger so I can add thicker padded insoles. The added volume also let me wear a little heavier socks when cold or cinch the laces down for thinner socks when hot. All the Superfeet I've tried are actually horrible for my particular feet. They are WAY to hard and hardly offer any padding. I've had good luck with $30 Spenco's and replace them every 6 months (I wear boots every day at work).
I've been using the flex for over a year at work as well as in my Nevada's. Can't comment on the flex thin but I tried several other insole from superfeet as well as others. The flex are the only one that feet my feet perfect.
I have the flex thin in a pair of hanwags that my regular insoles took up a bit too much volume. They a very nice on support but won't wow you with comfort they are thin so don't expect a ton of plush cushion.
I don't have a ton of miles on the boot/insole combo so without a good 15mi day I can't drop a definitive review