Supportive foundation garments are an important element of every outfit. When shopping for bras, look for materials that will create a smooth silhouette under your clothing. Be certain the cups are large enough to provide full coverage and straps are thick enough to support the weight of your chest without hurting your back. Determining your own bra size is a difficult task, so it's important to get sized before you invest. A good bra is more than a fashion piece, it plays a key role in maintaining posture and preventing back problems.