There’s a huge difference in quality between the bras sold at stores like Wal-Mart and ones sold in department stores. Better materials, better construction. This is doubly true for anyone who’s especially large-busted. Spending a little extra for a good bra will pay off in the end, because a quality bra can last for years if it’s properly cared for (hand-washed and line-dried). Cheap bras, on the other hand, often fall apart much sooner. This goes for sports bras, too.