I like your work! That is why I have a few questions for you.
Which era is your story set in? Medieval? futuristic? it can’t be modern as we don’t wear clothes like that.
If your era is futuristic then I have nothing to add except that this is a very nice piece of work. But if your era is medieval, then there are a few issues with the concept behind those clothes.
From a practical point of view, that part of exposed skin under the armpit doesn’t make much sense. It doesn’t protect from the cold, and any region that is in direct contact with your ribs is sensible to cold. Especially in a medieval setting, where catching a cold is very much akin to death - no medication back then.
Also, if the setting is medieval, and if your character is going to fight, then those exposed armpits are also a huge issue. Leather armors were often worn, as they give a somewhat better protection than simple clothing. Padded armor is the next better, followed by iron chainmail and the best being a combination of three layers of armor (padded armor, chainmail and plate armor). Your character is wearing leather armor, which means he is more likely to be a sneaky type or a ranger type. Sneaky types wearing leather armor didn’t really exist, they’d be too obvious and it would beat the purpose. But let’s say this is a somewhat fantasy setting, like in a novel, so it’s okay. But then, to come back to the point. Armpits are very sensible parts and one stab there can reach the axillary artery, which is a big and very important artery. If that one is stabbed, then you’re dead for sure. So nobody would leave their armpit that exposed. Armpits have always been the weakness of armors, you can’t protect it without harming your mobility and fighting ability. But at least, they’ll try to hide it and protect it with a little something. I rambled a lot, sorry about that. Good luck for your animated project =)