Why does evwryone buy the bison premium tie down straps ? are they just better than straps which come with bag?

No sure but we only use the straps that came with the roof bag....they do the job.

do the straps hold effectively? and are they robust? my concern is if they are easily damaged

The straps are robust, I was really pleased with this purchase it exceeded my expectation. I used it a few times now with its first trip to Cornwall from Derbyshire for a camping holiday.. would have been lost without it, well worth the money.

what are the dimensions of the box when on the roof please? Need length and width if possible

I’m not really sure I bought it for a family member but they used it on top of a van if that helps,

What size would be best for camping trips?

With the 21ft bag and a large estate car I managed to pack for 2 adults and 2 children for a 4 night camping trip

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Car Roof Bag, 21 Cubic Feet Large Roofing Cargo Carrier Bags Waterproof Soft Rooftop Luggage Storage Box for Any Cars with Roof Rack/Rails/Bars, includes Anti-Slip Mat

Product ID: 406125566

Details

Brand
Marretoo
Colour
Black
Item weight
4.78 Kilograms
Material
Polyvinyl
Product dimensions
132.1L x x

💧100% Waterproof 840D PVC Fabric

📦21 Cubic Feet Extra Large Capacity

🔒Includes Password Locks & Anti-Slip Mat

¥47590

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚗 Elevate Your Road Trip Game with Ultimate Waterproof Cargo Power!

SAFETY FIRST - Reflective strips enhance nighttime visibility, keeping you and your cargo safer on every journey.
DUAL SIDE ACCESS - Two pairs of waterproof zippers open from both sides for effortless loading and unloading on the go.
SPACIOUS FREEDOM - Generous 21 cubic feet capacity fits luggage for 5-7 people—perfect for epic road trips or family getaways.
ALL INCLUSIVE KIT - Comes with anti-slip mat, door hooks, extra straps, and password locks—everything you need for secure travel.
WEATHERPROOF WARRIOR - Heavy-duty 840D tearproof PVC fabric shields your gear from rain, snow, and road grime.

The Marretoo Car Roof Bag offers a robust 21 cubic feet of waterproof storage crafted from ultra-durable 840D PVC fabric, outperforming standard 700D materials. Designed for universal fit on any car with roof racks, it features dual-side waterproof zippers, reinforced seams, and reflective safety strips. Included accessories like anti-slip mats, door hooks, extra straps, and password locks ensure secure, hassle-free installation and peace of mind on long-distance travels.

Specifications

ASIN	B09NMZLP2C
Automotive Fit Type	Universal Fit
Best Sellers Rank	24,175 in Automotive ( See Top 100 in Automotive ) 13 in Roof Boxes
Brand Name	Marretoo
Closure Type	Zipper
Colour	Black
Country Of Origin	China
Customer Reviews	4.6 4.6 out of 5 stars (272)
Folded size	[Approximately] 24 inches (l) x 16 inches (w) x 6 inches (h)
Included Components	A Marretoo Car Roof Bag, 21 Cubic Feet Large Roofing Cargo Carrier Bags Waterproof Soft Rooftop Luggage Storage Box for Any Cars with Roof Rack/Rails/Bars, includes Anti-Slip Mat
Item Dimensions L x W x H	132.1L x 100.3W x 44.5H centimetres
Item Type Name	fabric
Item Volume	21 Cubic Feet
Item Weight	4.78 Kilograms
Manufacturer	Marretoo01
Manufacturer Part Number	Marretoo02
Manufacturer Warranty Description	manufacturer warranty for 90 days from date of purchase
Material Type	Polyvinyl Chloride (PVC)
Model Number	Marretoo02
Mounting Type	Roof Mount
Number of Items	1
Number of Packs	1
Shell Type	Soft
UPC	794775044382
Water Resistance Level	Waterproof

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TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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¥47590

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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The delivery time was excellent, and the packaging was secure.

2 months ago

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I loved the variety of products available. Will definitely shop again.

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