It depends on the nature of fabric used for making the polo-shirt and T shirts. If the Tee or Polo is made of 100% cotton, it is more water absorbable as the fabric structure is more loosely packed, It will roll up after dry, making the apparel crumple, normally it is unavoidable. Customer can refer to care label for proper washing and drying method, or they can choose apparel made of mixed polyester and cotton (such as CVC, TC fabric) in garment. With polyester in fiber, less roll up and crinkle effect on apparel are found.