This casual combination of a tank and a red crew-neck t-shirt is very easy to throw together without a second thought, helping you look on-trend and ready for anything without spending a ton of time rummaging through your wardrobe. Dial down the dressiness of your getup by sporting a pair of tan suede sandals. This outfit isn't a hard one to achieve and it's season-appropriate, which is important when it's extremely hot outside. Wondering how to master casual outfits as you go through your 20s? This combo is an amazing example.