The product is a set of silicone fat tire liners designed to protect tubes in 26-inch wheels, providing a 4.0 WIDTH barrier against flats. These liners are heat-resistant, heavy-duty, and impact-resistant, making them suitable for rough terrains. With a special high viscosity formula, they offer added protection against punctures and ensure a smooth ride. The package includes 2 liners, each measuring 5.55 x 4.33 x 2.8 inches and weighing 1.46 pounds. Ideal for cyclists looking to enhance the durability and performance of their fat tire tubes, these liners are a practical and reliable solution for off-road adventures.