You can attach them to your belt, but not quite as snug as the Terra ED case. The belt loop has a bit more room. Fine for walking/trekking, less so for trial running.
The case is biggish, but light. For alpine mountain climbing, I would prefer the Tera ED's. But I don't use them for that.
The views with the Victory Pocket 8x25's are instantaneous. No fussing and very comfortable for such small and light binoculars.
Just came home from a walk in the forest. Case is nice for that with easy access to the binoculars. And a tight fit for them with their eyecups extracted and IPD set form eyes at around 70mm.
Below are some pictures of the backside and inside of the case with the bins at IPD 70mm and eyecups extended, as I currently use them in the field: