[Ventilation and cooling design]:Our Streamlined dog motorcycle helmets with 14 air vents are designed for reducing wind Drag and increase airflow to keep your pet cool and breathable during summer riding. [Pet-Friendly]: Our dog helmet provides high-density EPS foam interior which features lightweight, will not add any pressure on your lovely pets' head and effectively minimize the risk of head injuries in case of accidents. [Comfortable&Easy-adjust]:Our bicycle helmet hat has quick release buckles with one touch control for easily putting on and off. And with soft detachable sponge mat inside, it will keep comfortable even if worn for a long time. [Cool Look & Cool Fashion]: Our pet helmet is designed for dogs outdoor activities,especially for motorcycling ,biking, walking. When you put on your motorcycle helmet, please help your pets put on theirs. [Size]:To properly measure your pooch,please measure the circumference of the dog's head with a fabric tape measureand refer to the size information to make correct purchase. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!