The Tire Insert Tannus Armour 27.5 x 1.95-2.50 is a practical bicycle accessory. Sitting between your tire and inner tube, the Tannus Armour provides puncture protection on the top, as well as sidewall protection from sharp objects and rocks. Made using the patented Aither technology, the multi-cell foam compound is not only extremely lightweight and flexible but also durable. Even if your tire gets punctured, this insert allows you to ride at 10 km/h without damaging the wheel. The Tire Insert Tannus Armour gives you increased grip and vibration dampening for a smoother, more comfortable and enjoyable ride.