For men! Via Nordstom -- a three piece suit (jacket, vest, pants) available in the pictured tan (very spring / summer appropriate). The suit is made from cotton. The jacket is lined and the pants are lined to the knee. I really like the matching vest, which helps dress up an otherwise semi-casual suit. All three pieces are $795. Find the suit here.
Compliment the suit with a dress shirt from John Varvatos, such as this grey and tan striped shirt (cotton and nylon; $125).