Yiannan Heavy Duty PEVA Shower Curtain Liner, Waterproof, with Magnets, Clear, 72"x72"

I'm sure it's great as a shower curtain, but I use it to insulate my windows in the winter!!! I measure my windows so I can order the right size curtain, then I order 3 twist spring curtain rods, also in the right size to accommodate each window (one for the top, one in the middle, %26 one for the bottom). I make a loop at the top of the shower curtain to hold the top rod. I use packaging tape on each side to make it stick together, but I also tape all across the curtain. I'm going to try stapling next time to see if that works since the tape can sometimes not stick to the curtain. Anyway, then I put it in the window %26 get everything to fit correctly. Oh, I forgot. I add 3 inches to the curtain on both sides of the window to make sure no wind/cold can get through the sides. I also leave a few inches at the bottom to make sure no wind/cold leaks out there as well. Once everything is measured %26 I know everything fits together perfectly, including the snugness of the curtain rods, then I'm good to go every year after that. The big job is the first year when you're measuring everything. After that, you just put it back up every winter, easy peazy bc all the measuring has been done. Takes about a minute to put it back up. Maybe 30 seconds. For the summer, you can store them under your bed, in a closet, behind your couch, under your breakfront, in your basement, or in your attic. I've been doing this for years %26 it works!!! I'm adding my kitchen windows this year bc last winter was BRUTAL!!! Also, it costs some money the first year, but then nothing after that %26 it can last 20 years!!! Probably more.

the strength and quality of the product