Need help with markings on Soviet jackboots

[HeavyMetalNoise]

Today, I got a pair of Soviet kirza jackboots, and I've been trying to figure out when they were made. On the waist of the sole, there is the number "285", which has the number "44" under it, which I know refers to the boot size in Soviet measurements. Underneath that is an inverted triangle with the letters "КИ" in it, surrounded by a 1 on the left and an 85 on the right, plus the letter "И" underneath the triangle mark. On the sole is the letters "ИIС" (maybe "И1С") above the aforementioned triangle mark. Anybody know more about these?