I'm wearing layers, and it's warm.

我穿太多了，而且这里很热。

Well, I'm wearing layers, and it's warm. Yeah.

我穿的太多了 这里又很热。

Because of that it means that that sweat stays on your skin making it feel as though you're wearing an extra layer of clothes.

因为这意味着汗液会停留在你的皮肤上，让你感觉好像多穿了一层衣服。

So, if you're wearing a lot of layers, a lot of shirts, you can say: " I'm wearing four layers under my jacket or under my shirt, so don't worry, I'm warm."

所以，如果你穿了很多衣服，很多衬衫，你可以说: “我穿了四层衣服，所以别担心，我很暖和。”