I have the Baby Jogger City Mini and found that the Snoozeshade Twin fitted really well. Due to the large hoods on the pushchair I don't think that the Snoozeshade Twin would be used to shade the sun but it's great for when my twins are sleeping. We're often out at nap time and so they're used to sleeping in the pushchair, but often don't sleep very well (they're 21 months). Using the Snoozeshade I've found that my daughter generally falls asleep quicker than usual, but the best bit is they seem to have a deeper sleep. The other day a police car went past with sirens blazing, normally this would be the end of nap time but they both slept on peacefully! I'm very impressed with the quality of the product, it fits into a small bag that easily goes into the basket under the pushchair for when needed, it's very quick to attach to the pushchair and easy to remove too, I've also managed to release half of it meaning that one twin can sleep undisturbed when the other wakes up. I'm really pleased with it and wish that I'd got it ages ago!!