Arm Warmer

Any recommendation for an arm warmer?
I am going to race in an Olympic triathlon next week in Texas and I am a little worried about being too cold on the bike (We are racing around 9 am and coming out of a spring feed lake). So on the advice of my teammates, I need to invest in a pair of all season arm warmers that I can easily take on and off and dry quickly. Any suggestions?
Thanks!
Have you thought about Under Armour-style products? They work to keep you cool when it’s hot out, and keep you warm when it’s cold out. They also dry quite quickly. You can purchase a long-sleeve shirt, or something like this (sleeve) might be good:
http://www.underarmour.com/shop/us/en/boys/sports/basketball/accessories/protective-gear/sleeves/pid8000068-Shooter-Sleeve/8000068-600
Make Your Own Hand & Arm Warmers: EASY & CHEAP!
