What's is this pocket on the lower back of my jacket? It goes all the way through. : r/whatisthisthing

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What is this pocket inside my gillet? : r/whatisthisthing

AllButtsWelcome: Pockets to Enhance your Rear View – Sewcialists

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Weird pockets in a jacket : r/whatisthisthing

Found a small zipper inside a puffer I recently bought. It's not a

What is this metal circle on my bag? Why is it there? : r/whatisthisthing

The JamCat Fleece Project – Upper Chest Zipper Pocket and

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