Promotional wearables is a category of promotional products that encompasses, naturally enough, things you can wear. It is one of the larger types of promotional product sales, and it includes much more than just a T-shirt or hat that most people probably think about when explaining what promotional products are.
Promotional wearables can be anything from T-shirts advertising a tour schedule to a tote bag from the local supermarket or even a hoodie from a hunting or fishing store. Shoes, headbands, scarves, mittens, fanny packs, wallets, and purses—the list goes on and on. If you can put it on your body in some way and it features a logo or advertisement, it's a promotional wearable.
Source: Kristine Shreve