In those cases, a rooftop cargo carrier is your best bet, and this polyvinyl bag from Asinking is a compelling option at its currently discounted price of $50 — half off the usual $100 sticker tag.

The best materials for dry bags are PVC (polyvinyl chloride) and TPU (thermoplastic polyurethane), each offering distinct advantages. PVC is known for its affordability, toughness, and ...