Yes, it is! And actually, when I went to measure the pocket, I realized that there are 2 open pockets inside, not just 1. They look to be identical in size and are just a little over 5.5 inches long. Though I don’t have a tube of lip balm that’s 3.75”, I tried inserting a sample sized toothpaste (actually about 4” long) and it fit in the pocket just fine.
I’ve attached pics of the interior to show both pockets, empty and with tube of toothpaste, and a modeling pic as well, to give another perspective of the size. I’m 5’6”.
**ETA I asked Marco to shorten the strap by a few inches. It’s a smidge shorter than what I’d consider ideal for me but not enough to order another strap

. I may just punch another hole in it.
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