These are likely 24.5cm IDLARA boots from the 15-16 model year. They have been heat-molded only once. Frequency of use: 2-3 times a year. I stopped using them for a while due to childbirth, but I wore them about 3 times last year and have purchased new ones, so I am selling these. There are no signs of hydrolysis, and they are not worn out. Although there is some wear and tear, I think these boots can still be used actively. Please purchase only if you understand that these are used items. There is no box or warranty. Please note that insoles are not included. Size: 24 - 24.5cm Model year: 15-16 model year or earlier