First a disclaimer, I am a heavy sweater and i got this in mid-September in the Northeast. The weather is pretty humid and there are some warmer days and I tend to run mid-day or late afternoon/early evening.
I got this because it seemed like a good way to protect my phone from the elements and save both money and waste by switching away from plastic bags like ziplocs. So this is just not gonna happen. This thing is just polyester with maybe some kind of DWR coating that seems to be rapidly deteriorating. My phone is covered in sweat after each run, and after using it once for a tough workout in mid-70s F there was a pool of sweat at the bottom of this pouch/bag that my phone was just sitting in.
I like it in theory but I think the advertising is a little too good to be true here. The zipper also doesn't quite cover the whole opening, and there is a little bit of fabric over the top but if your clothes are fully saturated I am sure the sweat just collects on this lip and the edge of the zipper and just drips down into there.
The pocket with carabiner is nice, but I find that in practice it is not very handy. Most shorts have a dedicated key pocket. This pocket is just a sleeve so it is not waterproof at all so I would hesitate to really keep anything in there but maybe one gel. This could also just fit into some other pocket or you could jam it into the main one.
I got the medium, and the main compartment fits my iPhone 16 just fine and I can stash my ID/cards, some cash if I want it to get wet, or maybe my small earbuds sans case.
It fits nicely in the thigh-side pocket like they show in the photos, but any pocket that is on the small of your back, below the waist will be too small. The one exception here is the multi-short which has a bigger compartment along the waist. Otherwise you need to use a belt or stash it in a bag/vest pocket or something.
I wanted to give it 1 star but I really love Janji and I think they had the right idea with this, but I really wish the inside was lined with something that was actually waterproof/sweatproof. Since I still need to use a ziploc I am at a loss as to what I will actually use this for? Maybe as a cool Janji pencilcase.