Polyester. Filled with plush cotton. Adorable duck figure with flappy wings,whenever you wear it, the cute wings will bring you happiness and comfort. This lovely rubber duck slippers available in size US 4-8 and US 6-11, which fit for women and men. NON-SLIP SOLE: These slippers were made with a non-slip sole to keep you from slipping and sliding on smooth surfaces SOFT WARM PLUSH FABRIC: The inner and upper plush lining provide superb softness Lovely and Stylish: this duck slippers make an adorable pair of footwear that will be appreciated by any ladies. It's easy to wear on and off with its easy slip-on, round toe design, so you can wear them in just a breeze.