I saw a review for this product during a web search.  My son has Type 1 diabetes and signed up for The Spartan Beast Race.  LOTS of muddy wet conditions and difficult terrain.  It was absolutely imperitive that my son have a container that would be large enough and seal well enough to keep his diabetic testing supplies dry during the race.  This product worked beautifully!  We bought an additional fanny H20 belt from a local store, put his diabetic tester, medicine, and syringes in the waterproof case, and put the case in the fanny pack.  The fanny pack could probably use another good washing because of how wet and muddy it got but the inside of this case stayed absolutely dry.  I would definitely recommend this product.  The only drawback was the shipping time.  I paid extra to get this product delivered in 3-5 business days.  Plenty of time to arrive before the race.  It took an additional TWO shipping days and only just arrived in time for us to get the product as we were pulling out of the driveway to go to the race.  Give yourself plenty of time to get the product or pay extra if you need it right away.  I don't believe this website displays the current shipping times.  Other than that I was definitely very pleased with the product!

I originally bought this for our beach vacation, to keep the sand out of my personal items that are usually kept in a purse, but I have found it to be perfect for my bike rides as well.  I got the medium size and my (i)phone, keys and id fit perfctly in it.  I do not find the snugness of the lid a problem to open and close thus far.  Though I have been using it for only two weeks now.

When it arrived it was a lot bigger than I had thought is was going to be. I was looking for something a little less bulky.

Took on a canoe trip and put everyone's keys, IDs, money, etc in it. Our canoe spilled but we lost nothing and it was dry! Very sturdy product.

This kept two phones, and our camera from getting wet on our jet ski ride and fit in the compartment fine. Really works to keep things water proof.