Good quality, but the arch support for flat feet should be higher; the curve at the arch point is relatively low and you don't feel the support. Also, due to their thickness in the heel area, the foot lifts high inside the shoe, resulting in the heel being raised while walking. Normally, the old insole of the shoe should be removed and only this one should remain. Also, very expensive for what they ultimately offer.

They seem good in quality. I tried them and they are comfortable. Do they support my wide feet arch? No, not at all. I trusted the company's popularity.

I put them in my Adidas sports shoes after removing their own insoles.
The shoe is size 44 and the insoles are size 43.
They fit perfectly.

Fantastic grip, very convenient for fast walking on a treadmill or outside even for running even in non-sport shoes.

My flat feet burden the thorn of my heel, with the Birko Active insoles I have clear improvement, I wear them in running shoes and the result is excellent.

Being the owner of Birkenstock sandals, I bought them to wear with Ultraboost shoes, which are comfortable but lack support during long hours of standing in clinics. The insoles maintain their shape under the arch of the foot, providing support, while easily bending along with the shoe in the front. The difference is night and day. I am extremely satisfied with the product. (*Note regarding size, in 44⅔ size adidas ultraboost, size 44 fits like a glove)

I wear them for sports. They fit me normally and after the insoles, they are still normal. I don't know if they do the job, but they are of excellent quality and durability

The sole is very hard! It hit me in many parts of the foot and it is very expensive for its quality

It is quite hard like a bottom and it bothers in some points (arch).
Expensive for what it offers.
I haven't had it for long to see durability and if it softens with use.
However, it has good construction quality and for that I give it 4 stars.