Original: They gave a new spin on fashion dolls; instead of traditional cloth clothing, Polly Pockets used unique "Polly Stretch" garments, created by Genie Toys, rubbery plastic clothes that could be put on the dolls and removed.
Simplified: Instead of the normal cloth clothing, Polly Pockets used "Polly Stretch" clothing. These were rubbery plastic clothes that could be put on the dolls and removed.