Buying one emergency blanket and buying a hundred solve different problems. The Emergency Blanket Mylar Thermal Space Survival Gear & Supplies 100-Pack is aimed at the second situation: having enough compact covers to place in several locations or hand out to a group.

I'd judge this pack by how you'll divide it up. A large box in one cupboard isn't very useful to someone whose car kit is empty, while individually assigned blankets can be easy to account for.

What You're Actually Buying

Quantity: 100 emergency blankets.
Material format: Thin Mylar thermal covers.
Intended role: Backup coverage in a preparedness supply.

The count is the clear selling point. It lets you stock several kits without treating every blanket as a separate purchase. Check the dimensions and individual packaging before planning how many people a blanket can cover or where each packet will fit.

Compact Coverage Has Limits

A Mylar cover is a very different object from a padded sleeping bag or a thick wool blanket. It can add a useful reflective layer, but it doesn't provide a cushion underneath you. Expect to need a suitable ground layer and shelter as part of the larger setup.

Wind also changes how easy a loose sheet is to manage. Practicing how you'll wrap and secure one is more useful than leaving every packet unopened until somebody needs it. A damaged sheet is another reason quantity can be handy, although having spares doesn't make the individual material tougher.

Who Needs This Many?

I'd compare this pack for an organization, a large family distributing supplies, or someone assembling multiple vehicle kits. For a single daypack, a smaller pack leaves less surplus to store and makes it easier to try a few different formats.

My take: the reason to choose this product is the supply of individual backup covers. Make a placement plan first, then decide whether a hundred is a sensible number rather than simply the biggest bundle available.