Yes, you are generally permitted to take the white terry-cloth slippers provided in your hotel room. Unlike towels, bathrobes, or bed linens, hotel slippers are considered "single-use" or disposable hygiene items. Because they cannot be effectively laundered and reused for another guest, hotels expect you to either use them during your stay and leave them behind to be trashed, or take them home with you. In fact, many travelers keep them for use on long-haul flights or as guest slippers at home. However, this only applies to the standard disposable variety; if a high-end boutique hotel provides branded, high-quality luxury slippers that feel more like permanent footwear, it is wise to check for a price tag in the room or ask the front desk to ensure they aren't intended to stay in the room.