Combining a navy wool blazer and aquamarine chinos is a guaranteed way to infuse your wardrobe with some casual sophistication. Wondering how to finish off this ensemble? Finish off with black suede chelsea boots to kick up the fashion factor. While dressing for winter weather can be a bit of a conundrum, combinations like this one make you feel excited. This is a pairing you, as a 30-year-old guy, can always rely on.