When it comes to convertible tops, not all materials are created equal. At OEM+ Auto Tops, we refuse to compromise on quality, which is why we exclusively use Haartz Twillfast RPC — a high performance topping material made by the folks who provide the premium material found on luxury vehicles like Bentley, Mercedes, BMW, Jaguar, Ford and more.
But what truly sets Haartz apart from other convertible topping materials? Let’s break it down.
The Haartz Advantage: Tested for Performance
Many manufacturers cut costs by using lower-grade materials, but Haartz maintains its position as the industry leader through rigorous testing and superior craftsmanship. Here’s how Haartz materials outperform competitors:
1. Abrasion Resistance: Built for Longevity
A convertible top endures thousands of open-and-close cycles over its lifetime. The Martindale Abrasion Test simulates this wear, and Haartz materials are tested up to 50,000 cycles — far exceeding industry standards. By contrast, some competitor fabrics begin to break down after just 4,000 cycles, leading to premature wear and failure.
“Haartz materials maintain integrity even after 50,000 cycles, while competitors see fiber breakdown at just 25,000,” a Haartz representative told us.
2. Color Retention: No Fading, No Staining
Exposure to sunlight and heat can cause cheaper convertible tops to fade and transfer color onto surrounding surfaces. The Crocking Color Transfer Test ensures that Haartz fabrics retain their rich color without bleeding onto interior surfaces, unlike lower-quality alternatives that show noticeable wear after exposure to heat aging.
3. Superior Flexibility: No Cracking Over Time
Convertible tops must remain flexible to withstand changing temperatures. The Flexibility Test mimics years of exposure to heat aging, and Haartz materials remain pliable while inferior fabrics turn brittle, crack and eventually tear — leading to costly repairs or replacements.
4. Unmatched Waterproof Protection
A convertible top’s waterproofing is crucial for keeping the interior dry and protected. The Hydrostatic Resistance Test measures how well materials withstand prolonged exposure to moisture. Haartz materials consistently pass with flying colors, while competitor fabrics degrade and lose their waterproofing over time, leading to leaks and interior damage.
OEM+ Auto Tops: A Commitment to Quality
At OEM+ Auto Tops, we’re dedicated to providing the best replacement tops in the industry. By exclusively using Haartz Twillfast RPC, we guarantee:
- Factory-quality durability
- Unmatched weather resistance
- Superior color retention
- Long-lasting flexibility
Don’t settle for anything less than the best. When you choose OEM+ Auto Tops, you’re choosing a convertible top built to perform just like the original — ensuring a long-lasting, premium look and feel for your vehicle.
To learn more about our products or register for our local installers list, visit oemplusautotops.com. You can also follow us on Facebook, Instagram, and YouTube for updates, tips, and insights.
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