A simple sling bag with one zipper pocket big enough for most smartphones, and one outer slip pocket for anything you need to access quickly.
The straps are poly webbing, adjustable in length, and removable.
Size: 7" tall x 5" wide
These are ideal for when you need to have your hands free. Take one on a walk with you so you can swing your arms freely. Or when you're taking your dog for a walk and need both hands to hold the leash. Use the bag for shopping so you can carry your purchases in both hands. Or when you're out with small children whose hands you need to hold (or a partner you're holding hands with!)
You can wear the bag on one shoulder straight down, or sling it across your body if that feels more secure.
Each bag can comfortably hold your phone, your Kindle, a pen, some cards, maybe a small shopping bag and your keys. You're all set.
(Dvidha meaning twofold, for the two pockets.)