If you are doing tris mostly around here, sleeveless probably should be the way to go.  Keep in mind that wetsuit season for tris is limited to the early season and late season races because most races in June, July and August are in water temperatures too warm for wetsuits period.

 

But with this unseasonably cold winter....I can see why you would think about a full sleeve suit for the Oxbow Tri this year.

 

And I think you can get arm warmer attachments to go with a sleeveless wetsuit so you have the best of both....you should get some great responses here from others in the forum on what's out there.

 

First time out...don't recommend ordering online.  I got mine at an Ironman y

 

 

I want to add that it also comes down to personal preference. Some people can handle colder water than others.  I have done a half IM with no wetsuit at 70ish water temp and did a sprint last year with the water temp at 66 with no suit.  I wish someone had advised me to buy a sleeveless instead of sleeved.  I think I might wear it more it if I wouldn't get so over heated.  Speed wise, not much difference in a sleeved vs. sleeveless.