Donut BAG, is the portable and free-standing model of Donut, in which a sinuous coil has been added to the two rims to increase its thermal efficiency, combining practicality and functionality with the need to bring warmth wherever needed. Easy to transport, thanks to its low weight and innovative ergonomic packaging, Donut BAG becomes the star of every environment. Total customization for each Donut, which can be made unique and exclusive by combining the colours of the two rims, valves and cables of the Hoop system.