Marry a dark green crew-neck t-shirt with blue ripped jeans if you wish to look casual and cool without trying too hard. Finishing off with a pair of brown leather casual boots is a surefire way to infuse a touch of class into this outfit. It is actually possible to remain cool and pulled-together under the summer heat, and this outfit is a stark illustration of just that This combination shows that after thirty you have a wide range of sartorial options.