--- product_id: 551683326 title: "21 Cubic Feet Waterproof Car Roof Bag, Soft Roof Cargo Carrier for Most Cars, SUVs & Vans with or without Roof Rack" brand: "signstek" price: "$129.65" currency: USD in_stock: true reviews_count: 8 category: "Signstek" url: https://www.desertcart.us/products/551683326-21-cubic-feet-waterproof-car-roof-bag-soft-roof-cargo store_origin: US region: United States of America --- # Ultra waterproof with sealed zippers 21 cu ft flexible storage capacity 8 reinforced heavy-duty straps 21 Cubic Feet Waterproof Car Roof Bag, Soft Roof Cargo Carrier for Most Cars, SUVs & Vans with or without Roof Rack **Brand:** signstek **Price:** $129.65 **Availability:** ✅ In Stock ## Summary > 🚗💨 Elevate your road trips with the ultimate waterproof rooftop cargo companion! ## Quick Answers - **What is this?** 21 Cubic Feet Waterproof Car Roof Bag, Soft Roof Cargo Carrier for Most Cars, SUVs & Vans with or without Roof Rack by signstek - **How much does it cost?** $129.65 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/551683326-21-cubic-feet-waterproof-car-roof-bag-soft-roof-cargo) ## Best For - signstek enthusiasts ## Why This Product - Trusted signstek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual-Side Access:** Convenient waterproof zippers on both sides let you pack and unpack without the rooftop gymnastics. - • **Spacious & Flexible:** Generous 21 cubic feet capacity with soft sides that adapt to odd-shaped gear, freeing up your car’s interior. - • **Weatherproof Warrior:** Crafted from ultra-durable, tear-resistant PVC that outperforms standard 700D fabrics for all-weather resilience. - • **Compact & Travel-Ready:** Folds down small for easy storage when not in use, saving precious trunk space for your next adventure. - • **Effortless Installation:** Quick-attach design with 8 reinforced straps fits any car—no roof rack needed, no hassle involved. ## Overview The Signstek Car Roof Bag offers a massive 21 cubic feet of waterproof, tear-resistant storage space designed to fit any vehicle with or without roof racks. Made from premium heavy-duty PVC fabric, it features reinforced straps and dual-side waterproof zippers for secure, easy access. Lightweight and foldable, it’s the perfect travel upgrade for millennials craving hassle-free, weatherproof cargo solutions that maximize space and style on the go. ## Description Signstek Car Roof Bag,21 Cubic Feet Large Roofing Cargo Carrier Bags Waterproof Soft Rooftop Luggage Storage Box for Any Cars With/Without Roof Rack/Rails/Bars : desertcart.co.uk: Automotive Review: Perfect replacement for my old roof box - This roof bag it great! I got it to replace an aging roof box that I had for many years, and was hoping it would be a suitable replacement. I did not disappoint. The straps are sturdy, the capacity is great, it was soooo easy to install, and it is waterproof (we drove through a biblical scale downpour and everything remained dry. I got soaked with seconds when we stopped in it!). It was really easy to take off and put back on so we didn't have to drive around with it on the whole time we were on holiday. It is definitely worth every penny. Review: Great quality of material - Brilliant quality and deal. It's bigger than I thought, which is a bonus. Perfect for all of my camping stuff and freed the boot space up. Waterproof and can be used with or without roof bars. Instructions were easy to understand, with removable straps ## Features - 【High-Density Waterproof Material】This is a Car Roof Bag.Made of heavy-duty wear-resistant and tear-resistant PVC fabric, this PVC fabric material is 1 to 2 times stronger than the 700D PVC fabric used in most other roof bags. This ultra-durable roof bag can easily handle all kinds of bad weather and long-distance travel. - 【Super Waterproof Design】Made of waterproof material, the waterproof effect of our roof bag will exceed your expectation. It includes waterproof zippers that open on both sides, a widened waterproof flap and reinforced seams. Helps keep your items dry. - 【Extra Large 21 Cubic Feet】- 52"L x 39.5"W x 17.5"H roof luggage bag provides you with plenty of storage space, unlike hard roof racks that are difficult to accommodate odd-shaped items, our product has a soft The sides can be bent to fit them. - 【Easy to Install and Open on Both Sides】- We provide 8 reinforced straps with heavy-duty buckles, which can be easily fixed to any car in just a few minutes. No matter what your car is, this roof rack can be installed without a roof rack. - 【Thoughtful Design】No need to deal with bulky hard shell roof rack bags. Our product can be compactly folded into a small size, allowing you to easily store it in the trunk of your car or in a storage bag, saving space. Maintaining it couldn't be easier: all it needs is an occasional wipe down. - 【Important Safety Information】Always check the roof bag and straps before every journey. Do not exceed the maximum load capacity of 45 kg, or the roof load limit specified for your vehicle. Ensure all items are fully zipped inside the bag and that the straps are tightened securely to prevent movement during travel. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CB43ZBQZ | | Best Sellers Rank | 6,588 in Automotive ( See Top 100 in Automotive ) 9 in Roof Boxes | | Brand Name | Signstek | | Country Of Origin | China | | Customer Reviews | 4.4 4.4 out of 5 stars (172) | | Included Components | Anti-Slip Mat, Car Roof Bag | | Item Dimensions L x W x H | 132.1L x 100.3W x 44.5H centimetres | | Item Type Name | Car Roof Bag | | Item Volume | 21 Cubic Feet | | Manufacturer | Signstek | | Manufacturer Part Number | 21 Cubic | | Manufacturer Warranty Description | 1 | | Material Type | Polyvinyl Chloride (PVC) | | Mounting Type | Roof Mount | | Shell Type | Soft | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Signstek - **Material:** Polyvinyl Chloride (PVC) - **Mounting type:** Roof Mount - **Product dimensions:** 132.1L x 100.3W x 44.5H centimetres - **Water resistance level:** Waterproof ## Images ![21 Cubic Feet Waterproof Car Roof Bag, Soft Roof Cargo Carrier for Most Cars, SUVs & Vans with or without Roof Rack - Image 1](https://m.media-amazon.com/images/I/71sNP6mCxcL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can this go on top of roof bars for a roof box** A: I used it without issue on my MG ZS-EV for a festival. Was easy to fit and held loads! Sturdy even at 70mph. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect replacement for my old roof box *by S***E on 6 February 2026* This roof bag it great! I got it to replace an aging roof box that I had for many years, and was hoping it would be a suitable replacement. I did not disappoint. The straps are sturdy, the capacity is great, it was soooo easy to install, and it is waterproof (we drove through a biblical scale downpour and everything remained dry. I got soaked with seconds when we stopped in it!). It was really easy to take off and put back on so we didn't have to drive around with it on the whole time we were on holiday. It is definitely worth every penny. ### ⭐⭐⭐⭐⭐ Great quality of material *by F***I on 25 February 2026* Brilliant quality and deal. It's bigger than I thought, which is a bonus. Perfect for all of my camping stuff and freed the boot space up. Waterproof and can be used with or without roof bars. Instructions were easy to understand, with removable straps ### ⭐⭐⭐⭐⭐ A well made product *by Y***C on 17 April 2025* Excellent product. Well made and a good size. Fitted car really well and didn’t move at all during the journey. I didn’t use the door clips but used all of the other straps to secure to the roof rails. It would have been better if the straps were fitted with ratchet tighteners as it was a bit time consuming adjusting the straps to fit. I didn’t put heavy items on the roof as I didn’t have the strength to lift them onto the roof, but I did fill the bag to its capacity. I would not put valuable items in it as I think it would be easy to break into when left unattended compared to the hard shell type of top box. However, it was very easy to use, affordable and I would recommend this product. ## Frequently Bought Together - Signstek Car Roof Bag,21 Cubic Feet Large Roofing Cargo Carrier Bags Waterproof Soft Rooftop Luggage Storage Box for Any Cars With/Without Roof Rack/Rails/Bars - Car Door Step Up Car Doorstep Folding Ladder U Shaped Pedal With Safety Hammer Function Car Accessories Easy Access To Rooftop For Car For Suv Rv Off-road Vehicle with 8 Car Rear Seat Hook - Bison Gear Premium Tie Down Straps - Car Roof Rack Straps for Surfboard Kayak or Cargo Lashing, 16ft 5m Long, 1in 25mm Wide, Heavy Duty Cam Straps with Buckle (4 Pack, Black) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/551683326-21-cubic-feet-waterproof-car-roof-bag-soft-roof-cargo](https://www.desertcart.us/products/551683326-21-cubic-feet-waterproof-car-roof-bag-soft-roof-cargo) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-13*