1. This is okay. 2. The word "top" in the sense of clothing is only used for women's clothes. 3. The term "casual wear" is only used for women's clothing. 4. This is okay grammatically, but you'd more likely hear: He's dressed casually. 5. This is okay grammatically, but doesn't sound quite right. You'd more likely hear something like: He's dressed in formal evening wear. o