Built to Last
Engineered for Any Condition.
From Arizona sun to Colorado hail — every DaShield cover is pressure-tested before it ships.
Why this vehicle needs the right cover
DaShield car covers for compact, midsize, and full-size cars use a breathable woven laminate construction that manages moisture in both directions: liquid rain blocked from entering the cover from outside, water vapor permitted to exit outward from inside.
The two-directional design addresses the condensation mechanism that non-breathable covers produce. Moisture in the enclosed air under the cover condenses against paint when temperatures drop at night. In high-humidity environments — Florida at 80 to 90 percent summer relative humidity, the Pacific Northwest at 150-plus annual precipitation days — this cycle runs consistently through the wet season.
The woven laminate maintains a hydrostatic barrier against liquid water (ISO 811) while allowing vapor molecules to diffuse through the fiber matrix at ambient conditions. Rain stays out. Humidity exits.
Compact, midsize, and full-size cars are mapped as separate sizing categories at vehicle selection. Roof height, windshield rake, and trunk profile differ across passenger car size classes, and a cover patterned for the correct size class seals properly at the mirror caps, rocker panels, and deck lid — which is where loose covers allow cover-and-paint contact abrasion in coastal wind conditions.
Select your make and model at the vehicle selector to receive the cover sized for your specific car and designed for the moisture environment of coastal, tropical, and high-precipitation climates.
Alvis TB 21 cover priorities
Engineered for the Alvis TB 21
For a compact, midsize, or full-size car parked outdoors in a humid or rainy climate, three engineering priorities define the correct cover selection.
First, two-directional moisture management. The breathable woven laminate blocks liquid water from entering while allowing water vapor to exit outward. This is the property that prevents the condensation cycle — moisture in the enclosed air depositing on cooler paint surfaces at night — from accumulating under the cover. Non-woven polypropylene and sealed PVC covers have low vapor transmission rates. They block rain and trap condensation equally. The woven construction resolves both directions as a single fabric design rather than a compromise between them.
Second, all-climate performance without humidity degradation. The Ultimum and Vanguard UHD are designed for continuous use in high-humidity, high-precipitation environments. Florida's five-month wet season, the Pacific Northwest's 150-plus annual precipitation days, and salt-air coastal exposure do not degrade the woven laminate's vapor transmission function. The cover maintains its breathable waterproof performance without a humidity ceiling.
Third, size-class fit for compact, midsize, and full-size cars. DaShield maps compact, midsize, and full-size passenger cars as separate sizing categories — windshield rake angle, roofline height, and trunk profile differ across the IIHS size classification range. The correct size class produces a cover that seats properly at the mirror and rocker anchor points without billowing in coastal wind conditions or pulling tight at the windshield.
Ultimum covers compact and midsize cars at $209.99, full-size at $219.99, with a Lifetime warranty. Vanguard UHD covers the same vehicle categories at $179.99 and $199.99 with a 5-Year warranty. Both use identical breathable woven laminate construction. Care for all woven outdoor covers: wipe-down with damp cloth only — machine washing degrades the laminate barrier and voids the warranty.
Customer Videos
See It In Action.
Verified Reviews
What Alvis TB 21 Owners Say
based on verified purchases
“I had a minor problem with my car cover, and DaShield showed exceptional problem-solving skills. They truly care about their customers' experience.”
“The warranty and complimentary cable lock, patch kit, and storage bag from DaShield enhance the overall experience, making them my go-to choice.”
“Kudos to DaShield for their honesty and transparency. They didn't try to sell me the most expensive cover but rather what suited my car best.”
“DaShield support is unparalleled. They resolved my issue promptly, setting them apart from competitors.”
“I've used other car covers before, but none of them have provided an experience quite like this one. It's a pleasure to use, and the results speak for themselves.”
“Other brands may be renowned, but this car cover surpasses it in every way. It's the ultimate choice for those who demand the absolute best in waterproof, durable protection.”
“Reliable service, quality product - very satisfied.”
“Efficient purchase, excellent service - no hassles.”
“In a face-off with Covercraft, this car cover stands tall as the victor. It's the top choice for those who crave unparalleled protection.”
“DaShield problem-solving skills are unparalleled. Competitors pale in comparison to their exceptional customer service.”
“If I could give this car cover more than 5 stars, I would. It's the gold standard of car protection. I couldn't be happier!”
“Quick response, fair price - exceeded my expectations.”
“Their honesty and commitment to customer satisfaction are second to none. They've earned my trust and loyalty.”
“Their coupon code didnt work so I had to pay the full price, but the cover was very good. I could've got 15% off . you guys need to refund 15%!!”
“I've used other car covers, but this one is the king of the hill. It's like comparing a masterpiece painting to a scribble - there's no comparison in quality.”
“I've owned a few car covers, but this one beats its competitors by a mile. It's like comparing a top-tier smartphone to an outdated model - it's just better.”
“Their warranty coverage is impressive, and the free cable lock, patch kit, and storage bag show they truly care about customer satisfaction.”
“When I had trouble selecting the right cover size, their team requested pictures of my car and garage to provide precise recommendations. Competitors offered generic size charts with no personalized guidance.”
“DaShield demonstrated exceptional problem-solving skills when I needed a replacement cover within days for an upcoming event. They expedited production and shipping, saving the day. Competitors couldn't meet the same tight deadline.”
“In a direct comparison with Covercraft, this car cover takes the crown. It's the go-to choice for those who demand the utmost in car protection.”
Verified Reviews
What Owners Say.
Our Story
Built for drivers who actually care.
Three minutes on why DaShield exists, how we engineer, and what makes the Ultimum series different from every cover on Amazon.
Common Questions
Alvis TB 21 Cover FAQ
Ready to protect your Alvis?
Find Your Perfect TB 21 Cover.
Guaranteed fit to your cab type and configuration. Ships free. Built to outlast any climate.
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