Penguin 2 Piece Baby Infant Boy Swim Diaper Swim Shorts and Rashguard Outfit. This set includes a green rashguard shirt, with black three quarter sleeves. The shirt also has a penguin on the front. The trunks are green with penguins on them. The trunks also have a side pocket. The fabric is treated with a UV protection factor of 50+. The swim trunks have a microfiber shell with built-in swim diaper. No other diaper necessary!