Tannus Armour Tire Insert - 26 x 2.6-3.0 SingleSitting between your tire and inner tube, Tannus Armour provides 15mm of puncture protection under tread, and 2mm of sidewall protection from sharp objects and rocks Eliminates 90% of all punctures due to its reinforced sidewall and underside protection Run at lower pressures for increased grip in wet conditions and loose rock Absorbs vibrations for a smoother, more comfortable ride Engineered to minimize rolling resistance (drag), Tannus Armour