Nylon Canvas Upper that Provides Durability and Comfort. ABEC 5 Wheel bearings and Low-Profile Rubber Wheels for the Perfect Roll. Rubber Sole for Extra Grip and Durability. Padded Collar and Tongue for Comfort and Foot Security. Heelys Roller shoes Pro 20 are available in girl's sizes. Shoes that allow you to roll through life without needing a skateboard, that's the innovative concept from Heelys! The secret? A wheel is integrated under the rubber sole of this model. Inside, there is a fabric lining and synthetic insole. With a fabric upper in black, the Pro 20 really has everything!