Got a lot to tote around? Anyone who's ever schlepped a big leather purse around on a 90-degree day knows that by midday, that cool calfskin usually morphs into a sticky, sweaty mess. Worse, should you choose to carry a dark-hued bag while wearing, say, a pretty white sundress, there's a definite chance that that color could rub off on your once-pristine lacy number—especially if you find yourself caught in a sudden summer downpour. Your best bet for sweltering weather? A canvas, raffia, tweed or otherwise woven carryall, which tends to be more resistant to color transfer and is totally sweatproof.