This is a phenomenal bag. I give it four stars because the materials on the outside look a little funny in person. The dark blue is canvas, the middle is vinyl, and the brown on the other end is canvas with a vinyl coating. Makes it look wierd. Otherwise, it's fantastic!! I've actually bought two more Timbuk2 bags since I bought this one. I use this one as a diaper bag now and my husband doesn't mind carrying it and I don't feel like a frumpy mom.

I love this item solely for the fact that if I have a warm drink of nearly any kind I can chill it in a matter of minutes. That having been said its drawbacks have just caused me to start keeping more things in the fridge.

These things are extremely overrated on Amazon. The quality of these was extremely inconsistent. Of the 8 packs, only 2 packs were actually sticky enough to stay on my foot. The others would slide around during the course of the day, which means they were not contacting the intended area. They would also completely stick to my socks, which would cause ripping of the fabric in my socks. On top of that, the low dosage of salicylic acid barely did anything. I strongly suggest getting a salicylic acid gel and using band-aids instead.