attire

An outfit or style of clothes is referred to as someone's attire.

You'll often hear people talk about changing their attire for different occasions. For example, they might wear formal attire to a wedding, business casual attire to work, or athletic attire when playing sports. Sometimes you'll even see articles about celebrities' red carpet attire or historical figures' military attire. In general, the word "attire" is used to describe what someone wears and how it looks, but it's not usually used for everyday clothes that just happen to be in your closet - it's more often associated with events or settings where you want to make a specific impression.