Tri Girl:

Yes, the Jaggad jersey very lightweight...micro-mesh type fabric.

I would definitely suggest wearing a LS jersey for IM AZ in November because of the sun. The sun in Phoenix is POWERFUL! And if you are fair complected like me, you just ROAST those arms like hot dogs on the bike!

I really think a light weight LS jersey keeps you cooler b/c the sun does not beat down on your arms. You could also use DeSoto arm coolers, but I use those for biking and would not want them on my body for 12+ hours...they are stretchy and close-fitting, which would turn really icky.

Good luck prepping for IM AZ in november. I am on the fence about whether to sign up for it before my race in April. With the new NA sports rules, I am afraid if I don't then I will be shut out of an IM in 2009. My problem is I just don't know where I will be in my life at that point. I don't even know where Uncle Sam is sending me in June, for crying out loud (wah! not back to AZ I know!).

Anyway, I would recommend a nice thin LS jersey and tri-shorts that are longer than average to protect the tops of the legs too.

Laura