If it's not already, a classic sundress should be high on your list of summer wardrobe staples. With just a few accessory changes, your outfit can easily transition from casual to dressy.

Look for a dress with timeless style and breathable material that you'll feel comfortable wearing all day. This cute little number from Bastille is made of 100% breathable cotton, and it's a versatile option for dressing up or down.

Girl by Band of Outsiders Carlotta Crochet Sleeveless, $325, Bastille

Dress it up with a statement necklace and a pair of strappy heels. Add a punch of color with a bright clutch, but remember to keep it simple. One statement piece is enough.

Necklace: Sugar Coated Necklace, $58, Anthropologie | Erica Weiner Bent Feather Ring, $35, Apt 202 | NARS lipstick in Heat Wave, $24, Sephora | Rebecca Minkoff Mini M.A.C bag, $150, Purse Dreams | Vince Camuto 'Niles' Sandal, $195, Nordstrom

For daytime or a casual night out, throw on a woven sunhat and flats. Keep your pout pretty with a tinted lip treatment, and cover up with a chambray top for cooler nighttime temps.

Michael Stars Mykonos Stripe Hat, $64, Lolabella Boutique | Erica Weiner Arrow rings, $50 each, Apt 202 | Fresh Sugar Lip Treatment in Coral, $22.50, Sephora | Arnold Zimberg chambray shirt, $166, Cake Boutique | MIA Gladiator Sandal, $60, JMR Chalk Garden | Michael Stars Natural Lace Crochet Tote, $98, Lolabella Boutique