Good undergarments are indeed the foundation of a great outfit. These are classic pieces that give you a clean, seamless, and sophisticated silhouette. While printed and colored underpinnings may be cute, they are far from being practical.

Invest in good underwear that will go a long way. Here are four sets every woman should have in her closet:

1. NUDE T-SHIRT BRA AND PANTY
Wear these with white pieces or sheer, thin fabrics.

2. PLAIN PUSH-UP BRA AND PANTY
Add a sexy cleavage to an LBD or a dinner dress with a push-up bra.

3. BLACK LACE BRA AND PANTY
These are for days when you need to feel sexy. Lace has an amazing ability to make you feel confident, and is exciting even under wraps.

4. PLAIN SEAMLESS WIRE-FREE BRA AND PANTY
The absence of wire lets you take a breather from the constriction of an everyday bra. This style also doubles as a minimizer and is perfect for loose tops and dresses.

(First published as "The Fashion Insider" in the "Shopping" section of Marie Claire Philippines' January 2009 issue. Photo courtesy of Etam.)