Traveling with a baby requires gear that's as versatile as it is durable. When it comes to bottoms, we look for pieces that can withstand hours in a car seat, impromptu naps, and still look polished for a family dinner. The right pants or leggings should feel like a second skin-breathable, stretchy, and forgiving of spills. Our buying guide focuses on travel-friendly features: quick-dry fabrics that survive washing in a hotel sink, elastic waistbands for easy diaper changes, and designs that transition from a plane seat to a stroller walk. We've tested dozens of options and consulted with parenting travel experts to bring you the best of the best.