This was a meaningful purchase for us because we bought this bag for our son to carry his diabetes technology and medication close to him at school. It’s bright, easy to see and is made of thick, durable material, meaning that it has survived countless active days at school and moving from class to class. I don’t think another moonbag could protect a smartphone on a daily basis the way that this bag does. The zip is strong and doesn’t stick, even after being used on a daily basis for months. While your needs for a moonbag may be different, I wanted to share our story as a testament to the quality of this product and also give a shout out to May and the team for their incredible customer service.