A white and red crew-neck t-shirt and skinny jeans are a bold casual combination that every modern gent should have in his off-duty arsenal. For extra fashion points, complement this look with a pair of black and white canvas low top sneakers. As you can see, it's super easy to look stylish and stay comfy when colder days are here, thanks to this outfit. And if we're talking fashion tips for teenage boys, this ensemble looks nice on most gents.