Durable, Comfortable, Smooth Qualities of the XBU55 fitness bike include: Easy Adjustments Cooling Fan High Density Foam Seat Challenging Programs 20 Levels of Resistance Indoor exercise bikes have been around for many decades. Their appeal & effectiveness have stood the test of time. Comfort, convenience, familiarity, enjoyment, & medical conditions are a few reasons this modality appeals to a large segment of the population. Free Delivery & Lifetime Warranty