SealLine Discovery Dry Bags - Made of ultra-durable materials, our versatile Discovery waterproof dry bag features welded construction for lasting performance, plus an updated closure that makes it easy to achieve a tight, protective seal for excellent fortification against water, from day floats to overland expeditions. Built for the journey: Made of rugged, flexible, and fully waterproof materials designed to withstand frequent and demanding use Light-colored interior: Significantly eases identification of contents within Oval bottom: Stable shape won't easily roll around; it's also easy to store, stack, and pack. Fully welded seams result in stronger and more durably waterproof construction compared to sewn-and-taped seams. Tight, simple sealing: Updated DrySeal roll-top closure makes it easier and more intuitive to achieve an optimal seal. PVC-Free: Materials have a reduced environmental impact over vinyl-coated materials.