What type of material to use on bumpers for team numbers?

I am from Team 5724. I am trying to set up my teams bumpers and I want to know what material would be best to use for the numbers on the fabric in this kit. http://www.andymark.com/AM14U3-p/am-3152.htm

AndyMark sells numbersyou can apply with a heat gun. If you don’t use these, other vinyl numbers, white paint, and silk screen are popular choices. Check out this thread, as well.

We at Robopromo have iron-on vinyl numbers available. Also new this year you can have numbers custom cut by us to complement your robots style. If you haven’t bought that kit yet, you can buy one from us and we’ll even iron the numbers on for you. Here’s a link for the numbers on our website:

standard:
http://www.robopromo.com/product_p/rp-2006.htm

custom:
http://www.robopromo.com/product_p/rp-2014.htm

See this threadon more ideas.