The Sea to Summit Meridian 25L Waterproof Tote uses a 10,000mm-rated fabric with fully taped seams and a roll-top dry-bag closure, so gear stays dry through genuinely wet conditions, not just light drizzle. Padded backpack straps with aluminum hooks detach in seconds, switching cleanly between hand carry, shoulder carry, and backpack mode depending on how far the day's walk actually is. What Our Gearhead(R) Experts Are Saying:"I set this on a wet boat deck for an entire afternoon, spray coming over the side more than once, and everything inside stayed bone dry. That's a real waterproof rating, not just a fabric that shrugs off a little mist."