Marretoo Car Roof Bag (21 Cubic Feet) – Waterproof 840D Roof Cargo Carrier with Anti-slip Mat
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Product description
The essentials
If you regularly end up with “we’ve got one more bag” panic before a trip, a soft roof storage bag can be a practical way to free up the boot. The Marretoo Car Roof Bag is a large rooftop cargo carrier designed to sit on a roof rack/rails/bars and take the extra luggage load, with a focus on waterproofing and everyday usability.
On paper, it’s aimed at drivers who want space for a group trip rather than a tiny weekend add-on. It also leans into durability with a heavy-duty 840D PVC fabric, plus a bundle of straps and side access to make loading less of a mission.
That said, there are a couple of “worth bearing in mind” points: a roof bag only works well if your car has suitable roof bars, and the bag’s size means it’s not the best match if you prefer compact storage when it’s not in use.
What it’s for (and what you’ll notice)
This Marretoo roof bag is built for long-distance family travel and larger outings where you need extra volume. The stated capacity is 21 cubic feet, with dimensions L52" x W39.5" x H17.5". In a real-world sense, it’s the sort of bag you’d use to move bulky items like travel bags, spare bedding, or sports gear that doesn’t fit comfortably inside.
A useful detail is the open design on both sides, which should make it easier to place items onto the roof bag and retrieve them without climbing around awkwardly. There are also partial reflective strips intended to improve visibility when driving at night.
Waterproof design that’s meant to handle bad weather
Waterproofing is a key part of the pitch here. The bag is described as using 100% waterproof material, plus waterproof zippers with openings on both sides, widened waterproof flaps, waterproof straps, and reinforced seams. The idea is straightforward: reduce the chance of water penetration when rain hits while you’re on the move.
It’s hard to fully judge real-world waterproofing from description alone, but the combination of features (zippers, flaps, straps, reinforced seams) suggests the manufacturer has tried to cover the usual weak points on soft roof storage.
One limitation: like most soft roof bags, performance in heavy, persistent downpours depends on correct fitting and how well the bag is secured and closed.
Durability and build material: 840D PVC fabric
The Marretoo bag uses heavy-duty 840D abrasion-resistant tearproof PVC fabric. The listing claims this 840D PVC is 1 to 2 times stronger than 700D PVC, with the aim of reducing ripping risk compared with softer alternatives.
If you tend to slide the bag in and out often, or you store it near sharp edges, a tougher outer fabric matters. It’s not guaranteed to prevent every possible tear in every scenario, but it gives the product a stronger “should cope with travel” angle than lighter-duty options.
Installation, loading, and the included extras
Setup is designed to be straightforward. The roof top carrier bag has 8 straps and is described as fixable to your car in a few minutes. There’s also mention of 8 straps, and the kit includes 6* door hooks plus 2* extra luggage straps, which should help with securing.
You also receive an anti-slip mat, which can be the difference between “it stays put” and “it shifts slightly when you corner”. The included storage bag is also useful for keeping it protected when it’s not on the roof.
On the security side, the package includes 2* password lock units. That’s a sensible extra if you’re leaving the car at a service stop or during short stops.
Tech specs
- Material: 840D abrasion-resistant tearproof PVC fabric
- Waterproofing: 100% waterproof material design with waterproof zippers and flaps
- Capacity: 21 cubic feet
- Dimensions: L52" x W39.5" x H17.5"
- Stated space: Large space for luggage of 5-7 people
- Fabric positioning claim: 840D described as 1 to 2 times stronger than 700D (as stated)
- Securing: 8 straps
- Included: anti-slip mat, storage bag, door hooks, extra luggage straps, 2 password locks
Buying verdict
Is it worth it?
You should consider the Marretoo 21 Cubic Feet Car Roof Bag if you need extra roof storage for family or group trips, want side access to make loading and unloading less painful, and care about proper waterproofing details like waterproof zippers, flaps, and reinforced seams. It also suits you if you like the idea of a tougher 840D PVC shell rather than relying on a lighter fabric.
It might not be a great match if your car doesn’t have roof rack/rails/bars that this style can secure to, or if you’re after something compact and easy to stow away. Also, if you regularly drive in extremely rough conditions, the bag’s “soft” nature means you’ll want to be extra careful with fitting and how tightly you pack items.
Mini FAQ
Is this roof bag easy to fit? The listing says it can be fixed to the car in just a few minutes using 8 straps, but it still depends on how your roof rack setup lines up.
How waterproof is it meant to be? It’s described as 100% waterproof, with waterproof zippers and flaps, plus reinforced seams. As with any roof bag, correct closing and fitting matter.
What makes the side-opening useful? With openings on both sides, you can load and retrieve items without having to reach over the same edge every time.
What’s included in the box? The listing states it includes the roof cargo bag, storage bag, anti-slip mat, door hooks, extra luggage straps, and 2 password locks.
Who is it best for? It’s aimed at larger trips, where the stated space is positioned for luggage for 5-7 people.