Well hey, if she’s inviting you over, they already did their job. From there, the rest is on you ;-)
How long do the insoles last before flattening or losing height?
Our insoles generally last about six months with regular everyday use. After six months, you may start to notice some wear and tear, including loss of height due to continuous compression. We recommend replacing your insoles every six months. You can also buy multiple pairs to spread out usage among shoes, allowing other pairs to decompress while one pair is in use. This can help increase the longevity of all your insoles.