Fashion or comfort
Whenever we are talking about fashion and comfort, then comfort always comes first. You should be considering the clothes that are comfortable and safe for your pet.
Preventing the allergies
You should not be selecting the clothes that can cause allergies to your pet. Rather you must go for the ones that are comfortable enough and should not cause allergy in any case.
Warm or not
We all know that the animals have their own layering system and they do not need an extra coat of clothes to keep them warm. You should be going for thin clothes rather than buying thick layered ones.