Being really formal or extremely casual are both easy; what's difficult is doing stylish-casual. Follow the cues from this Givenchy runway look - a light grey pair of trousers, snazzily striped buttondown, and dark vest with matching shoes...et voila, 'allo Monsier Sexy!

Mens_fashion_7 Faconnable Bengal stripe shirt - Nordstrom.com
Mens_fashion_11  Trousers in practical year-round wool - LandsEnd.com

Mens_fashion_14 Lord West 4-button vest - Buy4LessTuxedo.com (or print out this post & have your fave tailor make a version of the Givenchy for you)

Mens_fashion_9 Diesel Biowar belt - UrbanOutfitters.com

Mens_fashion_10 Todd Welsh Gilbert - Zappos.com

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