Would this work to put under a sheet in a crib to keep babies bed warm?

They do work for an outside feral cat I am caring for. I put a sheet under a blanket to keep cat warm and it is warm. but cat was scared of the the crunching sound. I used one blanket and it keeps you warm. I believe putting one under baby blanket would help keep baby warm.

Are these puncture proof? Do they tear easily?

Compared to similar mylar blankets, they are sturdier and longer lasting. However, they will puncture, and they will tear. They are not like regular blankets, not like tarps or similar things. They are not made for rough handling, but for heat and protection while sleeping or in emergency situations.

How many microns in thickness?

don't know the micron. it does have a mesh-like structure, almost like ripstop. it is light and durable. thicker than what foil balloons are made of but thinner and more flexible than tinfoil. I have worn it in -30 F and its worked wonders.

Odd question. can these block radio interference? i have a neighbor who plays with a cb radio and i pick up his transmissions and it's annoying.

Hell no . You need copper . Copper blocks all radio frequency

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QIO CHUANG Emergency Mylar Thermal Blankets -Space Blanket Survival kit Camping Blanket (4-Pack). Perfect for Outdoors, Hiking, Survival, Bug Out Bag ，Marathons or First Aid 1

Product ID: 81807158

Details

Brand
QIO CHUANG
Color
Orange
Material
Polyethylene
Special Feature
Waterproof
Style
Compact

🎒Compact 4-pack, easy storage

💧Waterproof & windproof

🔥Reflects 90% body heat

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Description

🛡️ Stay warm, dry, and prepared—because survival is the ultimate power move.

ALL WEATHER SHIELD - Waterproof and windproof design keeps you dry and protected from rain, snow, and wind.
DURABLE REUSABLE - Heavyweight Mylar fabric withstands harsh conditions and can be machine washed for repeated use.
ULTRA COMPACT READY - Individually sealed 4-pack fits perfectly in your bug-out bag or backpack for instant access.
HEAT RETENTION MASTERY - Locks in up to 90% of your body heat to prevent hypothermia in any emergency.
VERSATILE SURVIVAL ESSENTIAL - Use as ground cover, shade, emergency shelter, or even a solar oven—limitless outdoor uses.

The QIO CHUANG Emergency Mylar Thermal Blankets 4-Pack offers advanced aluminized Mylar technology that reflects up to 90% of body heat, ensuring critical warmth in emergencies. Waterproof, windproof, and reusable, these compact blankets are perfect for outdoor enthusiasts, survivalists, and first responders. Each blanket measures 84" x 55", is lightweight at 0.52 lbs, and comes individually sealed for easy storage. Ideal for camping, hiking, marathons, and emergency kits, they provide versatile protection against all weather conditions.

Specifications

ASIN	B07GLCYR5S
Additional Features	Waterproof
Age Range Description	Adult
Best Sellers Rank	#1,604 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2 in Camping Emergency Blankets
Blanket Form	Emergency Blanket
Brand Name	QIO CHUANG
Color	Orange
Customer Reviews	4.7 4.7 out of 5 stars (8,343)
Embellishment Feature	No Embellishment Feature
Fabric Type	Mylar
Fabric Warmth Description	Heavyweight
Fill Material	Polyester
Global Trade Identification Number	00707516010928
Item Dimensions L x W	84"L x 55"W
Item Thickness	0.01 Inches
Item Weight	0.52 Pounds
Manufacturer	QIO CHUANG
Manufacturer Part Number	JIJIU-4018
Material Type	Polyethylene (PE)
Model Number	JIJIU-4018
Number of Items	4
Pattern	Star
Product Care Instructions	Machine Wash
Recommended Uses For Product	Camping, Hiking, Emergencies
Seasons	All
Size	84 inches x 55 inches
Sport Type	Camping, Fishing, Hiking
Style Name	Compact
Subject Character	elf
Theme	Space
UPC	707516010928
Unit Count	4.0 Count
Water Resistance Level	Waterproof

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12579CFA

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