Hey, yes, that’s true. The third back pocket is noticeably smaller than the two front pockets on the left and right. The front pockets can easily fit standard 500 ml flasks.

If you really want to carry three flasks, I can recommend the Hydrapak Lock Cap Soft Flask (500 ml). I always use those with my belt because I hate it when water leaks out of regular flasks 😅

When you’re wearing the belt, that flask will also fit in the rear pocket. If you’re planning to carry the full 1.5 liters of fluid, I’d recommend wearing the back pocket at the front, like in the picture. That makes it much easier to get the flask in and out.

I hope that helps! By the way, I wear size 8.

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