Colours: These warmers are available in grey and pink colour options. Washable: The interior of these foot warmers is both removable and washable, ensuring a fresh and clean experience every time. Diverse use: Designed primarily for indoor use, these foot warmers are perfect for keeping your feet toasty while you work, relax, or unwind at home. Zipper closure: The standout features of these foot warmers include a convenient zipper closure, allowing for easy wear and removal. Material: These foot warmers are crafted with a plush exterior and integrated electronic components to provide unparalleled warmth and comfort.