Ronstan Waterproof Cases & Bags

Ronstan Weatherproof Bags: Marine-Grade Protection for Every Adventure

Ronstan has earned its reputation over decades as one of the world's most trusted names in sailing hardware — and that same engineering pedigree is on full display in their line of waterproof cases and bags. Born in Melbourne, Australia in 1953 and now supplying sailors across more than 65 countries, Ronstan approaches gear protection the same way it approaches blocks, cleats, and rigging: with a relentless focus on materials, construction quality, and real-world performance.

Built Around TPU Technology and Welded Construction

What sets Ronstan's weatherproof bags apart from generic dry bags is the deliberate choice of materials and manufacturing technique. Ronstan uses thermoplastic polyurethane (TPU) coated waterproof fabric throughout the range — a material that delivers a lighter yet extremely durable result compared to older PVC alternatives. Every main compartment features fully welded, leak-proof seams rather than stitched construction, eliminating the microscopic needle holes that allow water to seep into lesser bags. The result is a bag that can handle the relentless spray, rain, and submersion risk that sailors face on deck, in the cockpit, or on the water's edge.

A Range Designed for Life on and Off the Water

Ronstan's weatherproof bag lineup spans four distinct styles to match different load-carrying needs. Whether you're protecting personal items on a quick paddle or packing out full crew kit for a weekend offshore, there's a purpose-built option in the range:

• 10L Dry Roll-Top Bag — A compact, highly water-resistant bag with a simple fold-and-clip closure, removable shoulder strap, and a clear window so you can identify contents at a glance. Ideal for personal items, documents, or electronics.
• 30L Dry Backpack — Combines a water-resistant roll-top seal with a fully padded, ergonomic backpack harness, including padded straps, an adjustable cross-chest strap, and a neoprene-sleeved internal compartment sized for a laptop or tablet.
• 55L Dry Roll-Top Backpack — A rugged, high-capacity bag designed for all-day and multi-day use. It converts between a duffel and a backpack configuration, features four adjustable side compression straps, and includes a large external accessory pocket with a water-resistant zipper.
• Crew Carry-All — A large, lightweight duffel designed to protect and organize full crew kit while keeping everything dry from hatch to harbor.

Versatility Beyond the Sailboat

While Ronstan's heritage is firmly rooted in sailing, their weatherproof bags are engineered for any environment where water is a threat. The range is equally at home on a SUP, a kayak, a mountain bike, or a hiking trail. Water-resistant zippers protect exterior pockets from rain and spray, and the durable TPU shell handles abrasion from boat decks, dock hardware, and rough terrain. For sailors who already trust Ronstan blocks and hardware on their rig, extending that trust to bag storage is a natural fit.

Explore the complete Ronstan brand catalog to discover their full range of sailing hardware and gear, or browse all waterproof cases and bags to compare options across leading marine brands.