I wear this every day and all year, since 2001, no matter if it's -35 or +35 degrees Celsius.
When its all discolored, worn and old I buy a new vest and transfer the patches or get some new ones.
This is the latest 'build', dated 2018.
The backprint is actually the front of a t-shirt. I've had several different backpatches over the years, even some custom ones, but this is by far my favorite.