I was worried about accomplishing a perfect cover for a bike shelter I made with very specific dimensions and odd angles. I sent over a mockup with measurements of the structure and after a couple of emails with the team at Alco we had approved the design and sent onward to production. A few weeks later it arrived and it FITS LIKE A GLOVE. Everything was right, from the 2 oddly placed zippers and grommets I had asked for. They even included ventilation holes, handles and some straps to ease stress on the zippers. I ordered the 18 oz and it feels really strong and sturdy. Couldn't be any happier with the end result. I will be confidently recommending Alco Covers to others. Thank you!