Clothing. In all seriousness. You will see a range of dress. Shorts, t-shirts, dresses, slacks, polos, dress shirts. I've never seen bathing suits, but based on other clothing I've seen in signatures (viking face paint and cut-off shorts in Monsieur Paul) nothing would surprise me anymore. I typically wear a casual sundress and sandals and DH and DS9 wear khaki shorts, polos and either closed-toed sandals (like Keens) and sneakers.