Hah. Here in the PNW weather is unpredictable year to year, and with climate change getting more so.
We have winters with hard frost for 3 months, and a foot of snow. And we have winters with solid rain where it barely touches freezing. Likewise we have drought summers where it’s 85 F every afternoon for 3 months, and other summers where it rains until July and cools off in September.
So for both horse gear and human gear, the one year rule doesn’t really work. One winter you need a turnout blanket for three months, the next winter you don’t blanket the horse at all. One summer you never end up putting on your shorts or your bathing suit or sandals, the next summer you live in them. One winter you live in a down parka, the next winter you only need a raincoat. Etc.
I throw things out when they no longer fit