Mr Tuffy Ultra-Lite Tire Liners Description: Mr Tuffy Ultra-Lite Tire Liners aim to provide the same inclusive flat-protection as their previous counterpart, yet have been optimized to weigh 50% less than for better rolling efficiency and minimal weight penalty. Made of durable, lightweight, and biodegradable polyurethane, Mr Tuffy tire liners provide a protective barrier between your inner tube and road hazards such as glass, nails, thorns, and other sharp objects. Features: Liner intended for use between tire and tube to prevent flats Half the weight of the original Mr Tuffy Tire Liner Back of the liner is serrated to keep it in place inside the tire and curved to match the profile of the tire Bio-degradable once disposed of in a landfill or composting facility after a long and useful life Made in the USA Includes (2) Mr. Tuffy liners so you can flat-protect a pair of wheels Specifications: Tire Compatibility: 27.5 x 2.0 - 2.5", 29 x 2.0 - 2.5"