Adjustable Hook & Loop closure: The stem protector uses a hookandloop strap that can be easily adjusted to fit different stem sizes on bikes and other vehicles with stems. Simply wrap and fasten for a secure fit. Elastic Silicone: Made from elastic silicone with intelligent molecules, it will not deform and will not absorb energy, providing better protection than ordinary protective covers. Strong Safe Effect: In a fall, the protector helps shield the chest from impact with the hard handle, enhancing rider safety. Thick Fabric for Grip and Comfort: The thicker fabric increases friction between the protector and the stem, reducing drift and offering a comfortable tactile feel. Compatibility and Sizing: Adjustable to fit a range of stem diameters on most bikes and other vehicles with stems. Materials and Performance: Constructed from elastic silicone and durable fabric, designed to be longlasting, nondeforming, and reliable in everyday use. Use scenarios: 1) On children's bicycles of various types during family rides to maintain a secure fit and added chest protection. 2) On scooters or other rideon toys with handlebars to reduce movement and improve safety during minor falls. 3) When multiple vehicles are used or shared among siblings, allowing quick, repeated adjustments via the hookandloop closure.