What if I'm layering? Because I can do a pair of socks (the diamond ones), a tshirt under, then a polo over... and a Meraki-brand USB charging hydra in my hand.
Or two tshirts under and a polo over, but at that point the tshirts start to feel awfully bunchy in awkward places.
Seriously if you can, get one of the charging hydras. I use mine every day. I'm using it right now. 🙂