This 4 ft (122 cm) round modern rug in solid grey features a builtin memoryfoam cushioning layer (0.5 inch / 1.3 cm thick) that provides exceptional comfort for standing or seated activities. The top surface is a soft, lowpile polyester knit (0.2 inch / 0.5 cm) that feels smooth and warm. The bottom is equipped with a nonslip thermoplastic elastomer backing, ensuring it stays in place on hard floors. The rug is machine washable on a cold, gentle cycle, but we advise air drying to preserve the foam integrity. Its minimalist grey colour complements any decor, from professional offices to student dormitories. Use it under a desk chair, in front of a sofa, or as a floor mat in a classroom reading corner. The foam layer helps reduce joint stress, yet the rug remains lightweight enough for easy relocation. Avoid using with castor wheels that have sharp edges, as they may damage the foam.