Featuring welded seams and waterproof 100 percent recycled TPU polyester, this packing cube shields contents against daylong rain or an errant beverage container. It's equally good at isolating wet, messy gear: Sandy travel towels, snow-soaked gloves, and leak-prone bottles can travel inside to keep the rest of your stuff dry and clean. Heavy-duty lash points let you secure it to a backpack or duffel, where it delivers waterproof protection in all soggy situations except underwater dunkings.