— the pump, which is directly part of the rug. Usually, it looks like a characteristic platform, which you need to press with your foot or hands, after opening a special valve; another valve is used to release air (usually on the opposite side of the product). The built-in pump is convenient because it cannot be lost; on the other hand, it complicates the design of the rug and somewhat reduces its reliability. Therefore, this option is used quite rarely, and mainly in relatively inexpensive models.
