Hello how may I help you? I want to buy a bike helmet I can help you purchase a bike helmet. Did you have a specific helmet in mind? Yes. i want a blue titanium helmet with lights Did you want the model XO3 or the model XO4? Which one is cheaper? the X03 is 19.95, the XO four is 29.95. What's the main difference between them besides price? The X03 has less padding. Okay, Then I'll take the XO four. I will place an order for you for the helmet. Okay here is my credit card info and address