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

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

Product ID: 254313655

Details

Brand
QIO CHUANG
Colour
Orange
Material
mylar
Special features
Waterproof
Style
Compact

🎒Compact & lightweight for easy packing

💧Waterproof & windproof durability

🔥Retains up to 90% body heat

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Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Stay warm, stay prepared — your ultimate survival sidekick!

ALL WEATHER SHIELD - Waterproof and windproof polyester shell protects you from harsh elements.
HEAT LOCK TECHNOLOGY - Reflective Mylar traps your body heat to keep you warm when it matters most.
PACK LIGHT STAY READY - Ultra-compact design fits effortlessly into any bug-out bag or backpack without bulk.
EASY CARE LONG LASTING - Machine washable and durable heavyweight fabric built for repeated use in any adventure.
VERSATILE SURVIVAL ESSENTIAL - Use as a blanket, emergency shelter, poncho, or ground cover—your outdoor Swiss Army knife.

The ANMEILU Emergency Mylar Thermal Blankets 4-pack offers professional-grade heat retention by reflecting up to 90% of body heat. Designed with a waterproof, windproof heavyweight polyester exterior and compact enough to fit in any emergency kit, these 84x55 inch blankets are perfect for camping, hiking, marathons, or first aid. Machine washable and multipurpose, they deliver reliable protection and versatility for all your outdoor and survival needs.

Specifications

ASIN	B07GLCYR5S
Additional Features	Waterproof
Age Range Description	Adult
Best Sellers Rank	#43,961 in Sporting Goods ( See Top 100 in Sporting Goods ) #59 in Camping Emergency Blankets
Blanket Form	Emergency Blanket
Brand Name	QIO CHUANG
Color	Orange
Customer Reviews	4.7 4.7 out of 5 stars (7,984)
Embellishment Feature	No Embellishment Feature
Fabric Type	Mylar
Fabric Warmth Description	Heavyweight
Fill Material	Polyester
Global Trade Identification Number	00707516010928
Included Components	4 blankets
Item Dimensions L x W	2.13L x 1.4W Meters
Item Thickness	0.01 Inches
Item Weight	236 g
Manufacturer	ANMEILU
Manufacturer Part Number	JIJIU-4018
Material Type	mylar
Model Number	JIJIU-4018
Number of Items	4
Pattern	Stars
Product Care Instructions	Hand Wash Only
Recommended Uses For Product	Camping, Hiking, Emergency, Multipurpose
Seasons	All
Size	84 inches x 55 inches
Sport Type	Camping, Hiking
Style Name	Compact
Theme	Space
UPC	707516010928
Unit Count	4.0 Count
Water Resistance Level	Waterproof

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