Waist Clips
Training pouches that rely on a waist clip to attach right to your pants or belt don’t have a strap to contend with; these are ideal if you dislike restriction, or want something you can easily pop on and off.
Waist Straps
Waist straps can be more constricting but are much easier to use and access when wearing a thick winter jacket. A waist strap also allows you to position the treat pouch wherever you’d like on your body, whether that means on the side of your hip or directly in front of you.
Over-The-Shoulder Straps
Shoulder strap pouches tend to have the largest capacity and also usually have a plethora of extra pockets and pouches. This can result in a larger and bulkier pouch, with the inability to adjust or position the pouch exactly where you’d like, besides simple heigh adjustments.
Choosing between the three will boil down to your personal preference, so just pick the one that you think will be most comfortable and easy to use.