Had to replace my Fizik bag from 2013 and just got a specialized. Must say very impressed with the way they designed it. The velcro is intelligently done with enough length to assuage any concerns of the bag coming undone. Further unlike the other bags I've had this has a small reflective yellow area on the back. I really like the small attention to detail. The bag even fits a bit more than most without being bulky. Nice to see a company paying attention to a very ordinary product.