I almost forgot about these little short-sleeved sweaters! I got two (this one and a gray one) last summer. I usually don't wear short-sleeved sweaters because I like being able to put something long-sleeved on top (my office is cold!), but it was so hot out that I just went for it! And I was fine all day at work.
Shirt - Old Navy Sweater - Mossimo Slacks - New York & Company Sandals - Covington Watch - Mossimo