Sweaters and Sweatshirts in a different category! But Why? Well, there is a reason for this madness at Kawaii Stop. The most basic difference between a sweater and a sweatshirt is the way they’re made. A sweater is crocheted or knitted, whereas a sweatshirt is not. A sweatshirt is made with heavy cotton. … Sweaters are made of lightweight material, so they don’t absorb sweat but just keep you warm. We hope this helps on why we tend to keep these two separated! We want to ensure you are in the right place for exactly what you are looking for. As always, Kawaii Stop has hand-picked these items just for you and all have an amazing price! Found a better price? Let us know and we will try to beat it!