A navy vertical striped double breasted blazer and light blue jeans are true menswear staples if you're crafting a casual wardrobe that matches up to the highest sartorial standards. Tone down the dressiness of this outfit by wearing a pair of white and navy leather high top sneakers. This outfit isn't a hard one to nail and it's summer-ready, which is important when it's roasting hot outside. Perfect if you're on a mission for some seriously inspiring relaxed style for gents in their thirties.