The black parts are made of knit material. The main color is different in the front and back, making it a cute item‼︎ You can wear it with the side zipper open or closed. It's a long-sleeved top that allows you to change the way you wear it depending on your mood☺︎ Set-in sleeves can emphasize the width of your shoulders, but this item has a raglan design, with the sleeves cut diagonally, which can camouflage the width of your shoulders. It allows for a relaxed, loose fit, making it a perfect item for those who want to add a casual, relaxed feel to their outfit. If you want to know the size, please feel free to comment♪