These cushions are out in the open air of Montana all summer long. They work great. So glad to have them. I could have purchased a new set of furniture, but I only needed cushion. I myself was having a hard tim fitting u-shaped couch with two square corners, my personal shopper from Wayfair entered and she made them all work. 
I purchased sunbrella cushions for lg. u-shaped couch, rocking chair, love seat, 2 lounge chairs and ottomans and happy for the  personal shopper’s help or it would have been so frustrating for me and the seller with mistakes and returns. If you are in doubt, speak with  get assistance from personal shopper for experienced, knowledgable guidance.