7 Best Soft Sided Boxes For Travel Convenience For Rvs

Maximizing storage on an RV roof is a constant battle against weight limits and aerodynamic drag. A soft-sided cargo bag offers the flexibility to store bulky, lightweight items while folding away to nothing when the destination is reached. Choosing the right one balances weather resistance against the ease of mounting to your specific roof setup.

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Thule Interstate: Best Premium Cargo Bag

The Thule Interstate stands out for those who prioritize security and high-end construction above all else. This carrier features a heavy-duty, water-resistant material and a unique design that includes a lockable zipper track. It provides the peace of mind needed when hauling gear through varying climates or across long, exposed stretches of highway.

The primary advantage here is the integration with the Thule brand ecosystem, ensuring it pairs perfectly with standard crossbars. While the price point is significantly higher than generic alternatives, the reinforced corners and heavy-gauge hardware justify the cost. For long-term travelers who demand gear that won’t fail mid-trip, this remains the gold standard.

If you are a frequent traveler who relies on your rooftop storage for critical seasonal equipment, the Thule Interstate is the smart investment. It is not the choice for someone seeking a quick, cheap fix, but rather for the traveler who views cargo management as a permanent part of their mobile setup.

RoofBag Explorer: Most Waterproof Option

Water intrusion is the single biggest threat to soft-sided rooftop cargo, and the RoofBag Explorer addresses this with a proprietary, non-porous material. Unlike bags that rely on thin coatings, this unit is engineered to be fully waterproof without needing an additional rain fly or cover. It effectively creates a sealed environment for your sleeping bags, linens, and soft goods.

The design utilizes a heavy-duty zipper protected by a massive storm flap that effectively shunts water away from the opening. It is robust enough to withstand highway speeds in heavy downpours, which is a rare feat for fabric carriers. Because of this specialized construction, it remains the top choice for those traveling through regions known for unpredictable weather.

Avoid this option if you are looking for a lightweight, flimsy bag that is easy to stash in a tiny drawer. The material is thick, substantial, and requires a bit of effort to fold, but the trade-off is superior protection for your belongings. This is the carrier for travelers who prioritize keeping their gear dry above all other features.

Yakima CargoPack: The Most Durable Pick

Durability in a cargo bag often comes down to the quality of the stitching and the resilience of the base fabric. The Yakima CargoPack utilizes high-quality, abrasion-resistant materials designed to withstand high-velocity wind fluttering. This bag is built for the rigors of the road, featuring reinforced seams that handle tension better than most budget options.

The internal structure is designed to hold its shape even when partially full, which reduces the “flapping” noise that drives many RVers crazy on long drives. It integrates seamlessly with a variety of rack systems, offering a tight, secure fit that doesn’t migrate under pressure. Yakima’s focus on long-term performance makes this a workhorse for those who put serious miles on their rig.

This is the right choice for the RVer who wants a “set it and forget it” solution. While it lacks some of the bells and whistles of ultra-premium bags, its sheer toughness ensures it will survive seasons of heavy use. It is a reliable, professional-grade tool for serious road warriors.

Rightline Gear Sport 3: Best Overall Value

The Rightline Gear Sport 3 strikes the perfect balance between price, capacity, and functionality for the average RV owner. It is constructed from a proprietary PVC semi-coated mesh that is both UV-resistant and waterproof. The carrier is remarkably light, making it easy to hoist onto the roof of an RV without needing a second person.

One of the standout features is its versatility; it can be used with or without a roof rack, thanks to the included strap system that hooks into the vehicle’s door frame or around crossbars. This flexibility makes it an excellent choice for those who might switch between different vehicles or rental rigs. The sizing is generous, allowing for significant storage without ballooning into an aerodynamic hazard.

This bag is recommended for the majority of travelers who need extra space but don’t want to break the bank. It performs reliably under standard conditions and offers enough capacity to clear out a cramped RV cabin. It is the pragmatic choice that delivers exactly what is promised without unnecessary complexity.

FIVKLEMNZ Cargo Carrier: Max Capacity Champ

For those hauling bulky, lightweight items like beach gear, extra pillows, or seasonal jackets, the FIVKLEMNZ Cargo Carrier is an impressive volume leader. Its design focuses on maximizing the interior footprint, allowing you to pack more gear than most standard competitors. The construction uses a triple-layer, high-density fabric that holds up well against tears and road debris.

The benefit of this capacity is clear: you can keep the interior of your RV clutter-free by moving everything that isn’t essential to the roof. However, the sheer size means it requires careful packing; if you don’t fill it correctly, the excess fabric can catch wind. Use compression straps to cinch it down if you aren’t carrying a full load to maintain stability.

This bag is ideal for families or long-term travelers who have a high volume of lightweight goods to transport. If you are struggling with “stuff” overflowing in your living space, this is the most efficient way to reclaim your square footage. It is the ultimate tool for those who prioritize capacity over aerodynamics.

MEFOSKO Waterproof Bag: Top Budget Pick

If you only travel occasionally or are new to the RV lifestyle, the MEFOSKO Waterproof Bag offers a functional entry point. It utilizes a durable, water-resistant fabric that handles basic road conditions with ease. While it lacks the heavy-duty reinforcements of premium brands, it is perfectly capable of keeping gear dry during standard summer road trips.

The simplicity of the design is its main draw, as there is very little to go wrong or break. It is lightweight, easy to load, and folds down into a compact package that takes up almost no space in a storage bay when not in use. It is an excellent way to test the utility of rooftop storage without making a significant financial commitment.

This is the choice for the weekend warrior or the budget-conscious traveler who wants to see if a cargo bag fits their lifestyle. While it isn’t designed for a cross-country trek in a hurricane, it provides adequate protection for everyday travel needs. It is an honest, functional piece of gear that avoids the “premium tax.”

Amazon Basics Cargo Bag: For Occasional Use

The Amazon Basics Cargo Bag is the definitive utility option for those who prioritize convenience over high-end materials. It provides a standard, no-frills storage solution that mounts easily and holds a surprising amount of gear. It is essentially a heavy-duty, weather-protected duffel bag meant for your roof rack.

For short trips where the weather forecast is clear and the distances are manageable, this unit performs admirably. The material is adequate for preventing moisture from getting in during light rain, though it should not be relied upon for extreme conditions. It fills a necessary gap in the market for users who need space for gear that doesn’t require high-tech weather sealing.

This bag is perfect for the RVer who takes only one or two major trips a year and needs somewhere to stow holiday decorations or guest linens. If your storage needs are intermittent, don’t overspend on industrial-grade gear. Stick to this reliable, budget-friendly option and put your savings toward your next destination.

Sizing Your Soft Box for Your RV Roof

When selecting a bag, the dimensions of your RV roof and the placement of existing vents or AC units are the primary constraints. Measure the clear area on your roof rack specifically, rather than the entire roof surface. A bag that hangs over the edge of the rack is prone to catching wind, which creates noise and puts unnecessary strain on the mounting straps.

Consider the height of your RV as well, as adding a loaded cargo bag increases your total clearance. Always verify your new maximum height to avoid low-hanging branches or bridge overpasses at gas stations. A well-sized bag should sit flush within the perimeter of your rack, leaving enough clearance to tighten straps without damaging the fabric.

• Measure crossbar spacing to ensure the bag base is supported.
• Account for antenna and vent clearance; never obstruct these.
• Prioritize a footprint that allows for a secure, multi-point tie-down.

Hard Shell vs. Soft Sided for RV Travel

Hard-shell boxes are synonymous with security and aerodynamics. They provide a rigid, lockable container that is impervious to theft and significantly quieter at highway speeds. However, they are heavy, expensive, and a permanent fixture that remains on the roof long after the items inside have been emptied.

Soft-sided bags offer the supreme advantage of portability. They can be removed, emptied, and stowed inside a cabinet, keeping your RV’s center of gravity low and improving fuel efficiency when storage isn’t required. The trade-off is a lack of hard security and a higher profile that requires more frequent attention to strap tension.

Choose a hard shell if you plan on leaving the carrier on the roof permanently or carrying high-value electronics. Choose a soft-sided bag if your goal is flexible, temporary storage that disappears when you reach your campsite. The decision ultimately rests on whether you prioritize constant utility or the ability to shed weight and drag when not in use.

Securing Your Cargo Bag: Straps & Racks

The safety of your cargo depends entirely on how it is tethered to the roof. Never rely solely on the straps provided by the manufacturer if they feel thin or cheap; invest in a set of high-quality cam-buckle straps. These allow for precise tensioning and are far less likely to loosen under the vibration of highway travel than simple webbing loops.

Always cross your straps over the top of the bag to create an X-pattern. This prevents the bag from shifting laterally during turns and stops the fabric from ballooning under wind pressure. If you are using a roof rack, ensure the straps are looped around the crossbars themselves, not just the side rails, to provide the most secure anchor point.

• Check strap tension after the first 20 miles of any trip.
• Avoid using bungee cords as a primary means of securing the load.
• Keep excess strap length tied down securely to prevent slapping against the roof.

Soft-sided cargo bags are one of the most effective ways to expand the usable footprint of an RV without the permanent weight or cost of hard-shell alternatives. By selecting the right bag for your specific climate and storage needs, you can reclaim your living space and focus on the road ahead. Whether opting for a premium Thule or an entry-level Amazon Basics model, proper securing and sizing remain the keys to a stress-free travel experience.