Mart Cobra Emergency Blanket Mylar Thermal Space Survival Gear 4-Pack Review
A compact four-pack of reflective Mylar emergency blankets for heat retention, shelter, and first aid in cold weather or survival kits.
| Brand | Mart Cobra |
|---|---|
| Category | Cat Gear & Supplies |
| Color | Silver |
| Size | 4 Pack |
| Unit Count | 4 |
| Material | Aluminized Mylar |
| Best for | Car emergency kits, camping, and emergency preparedness kits |
Product Overview
This Mart Cobra four-pack provides four silver Mylar emergency blankets designed to reflect body heat and serve as a lightweight survival tool. The listing positions it for cold weather, car kits, camping, hiking, and emergency preparedness.
This review checks the claimed heat retention, unfolded size, packed size, durability, and practical uses against the listing details and common emergency blanket expectations.
Score Breakdown
This verdict is based on the manufacturer's stated specifications, the current Amazon listing and its product images, the confirmed materials and design, real buyer ratings, and our research into the product category. Scores are consistent editorial judgments, not laboratory measurements, and we did not receive a paid sample.
Key Features
Aluminized Mylar reflects up to 90 percent of body heat to help prevent hypothermia and shock.
Can be used as ground cover, shelter, or emergency blanket for camping, hiking, and disasters.
Unfolds to 82 by 52 inches but folds down to a compact size for bug out bags, backpacks, and car kits.
Tear-resistant Mylar supports repeated use for long-term emergency reliability.
Fits into emergency kits for car safety, hiking, power outages, and disaster preparedness.
Design and Build Quality
Each blanket is made from aluminized Mylar and unfolds to 82 by 52 inches. The silver reflective finish is designed to radiate body heat back, and the listing describes the material as tear-resistant and reusable.
The four-pack folds to a compact size, but the exact folded dimensions and weight are not confirmed in the listing. No storage pouch or individual packaging is mentioned.
Performance in Everyday Use
The primary performance claim is retention of up to 90 percent of body heat, which is typical for Mylar space blankets. In cold, wet, or windy conditions, the blanket works best when wrapped tightly or used with an outer layer to trap heat.
A real limitation is that thin Mylar blankets are noisy and can tear at stress points if handled roughly, despite tear-resistant claims. The listing does not provide wind or water resistance ratings, so treat this as a vapor barrier and radiant reflector, not a padded or insulated blanket.
How It Performs: The Evidence
| Decision factor | What we found | Evidence and measurement | Score | Why it matters |
|---|---|---|---|---|
| Heat reflection | Up to 90% body heat retained | Feature bullet: retain up to 90% of body heat | 8.5 | Matches common Mylar emergency blanket performance. |
| Unfolded size | 82 by 52 inches | Feature bullet: each blanket measures 82 by 52 inches | 8.0 | Large enough for an adult but not oversized. |
| Packed size | Compact fold, exact dimensions not listed | Feature bullet: folds down to a compact size | 6.5 | Compact but no exact folded size or weight to compare. |
| Durability | Tear-resistant and reusable | Feature bullet: made with tear-resistant Mylar | 7.0 | Mylar is thin; real-world stress can cause tears. |
| Pack count | 4 blankets | Title: 4-Pack Foil; product info: unit count 4 | 8.5 | Covers multiple people or backup uses. |
Who Should Buy It
- Bug out bags
- Car winter safety kits
- Hiking and backpacking
- First aid and emergency shelters
- Power outage preparedness
- Anyone needing insulated, non-reflective, or quiet blankets for regular camping comfort
- Listing does not confirm packed weight or folded dimensions
- No storage pouch or individual packaging described
Full Specifications
How It Compares
| Feature | Mart Cobra | Typical option | Higher-tier option |
|---|---|---|---|
| Heat retention | Up to 90% body heat claimed | Similar 80 to 90% reflective ratings | Wool or fleece blanket retains heat when wet but heavier |
| Packed size | 82 by 52 inches unfolded; compact fold not specified | Often similar unfolded with slightly smaller folds | Bivvy sack packs smaller but single use |
| Durability | Tear-resistant Mylar, reusable | Standard Mylar can be fragile but reusable | Heavy-duty polyethylene tarp is more durable but bulkier |
| Multi-use | Blanket, ground cover, shelter | Similar emergency uses | Foil bivvy only wraps one person |
| Pack count | Four blankets per pack | Usually sold in 1 to 4 packs | Single blanket may be cheaper but less coverage |
| Moisture resistance | Not specified; Mylar is non-absorbent | Usually water-resistant but not rated | Waterproof nylon poncho provides rain protection |
Alternatives Worth a Look
This four-pack offers the core reflective emergency blanket function in a compact format. It is a practical addition to car, home, and outdoor kits, though the listing omits folded size and weight details.
Frequently Asked Questions
What are the unfolded dimensions of each blanket?
Each blanket measures 82 by 52 inches, according to the listing.
How many blankets come in the pack?
The pack includes four blankets, as stated in the 4 Pack size and unit count.
Can these blankets be reused?
The listing describes the Mylar as tear-resistant and reusable, though no reusability rating is provided.
Are these blankets waterproof?
The listing does not confirm waterproofing. Mylar is non-absorbent and can act as a vapor barrier, but no wind or water resistance certification is given.
Do they come with a storage pouch?
The listing does not mention a storage pouch or individual packaging for the blankets.
This review is based on the manufacturer's stated specifications, the current Amazon product listing and its images, the confirmed materials and design, and our own research into cat gear and supplies as a product category. Our scores are editorial judgments made against consistent criteria, not laboratory measurements, and we did not carry out destructive or long-term stress testing.
Where the listing did not clearly confirm a detail, such as exact dimensions, weight or certifications, we have deliberately left it out rather than guess. If you are buying, always confirm the current specification and price on the live Amazon listing, since configurations and availability change.