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About this item

  • Activates instantly with a squeeze
  • No refrigeration required
  • Compact 4" x 5" size
  • Disposable single-use design
  • Case of 24 for easy restocking

Dynarex Instant Cold Pack, General Purpose, Disposable, 4" x 5"

Dynarex  |  SKU: 4511-Case
$1999
FSA/HSA eligible Can be bought with an FSA/HSA card — no prescription or Letter of Medical Necessity needed. We keep this up to date, but always confirm eligibility with your health plan. Learn more

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Dynarex Instant Cold Pack, General Purpose, Disposable, 4" x 5"

When you need cold therapy in a hurry, the Dynarex Instant Cold Pack delivers on-demand cooling without any freezer or refrigeration. Just squeeze the 4" x 5" pack to activate the reaction between the calcium ammonium nitrate and water inside, and it's ready to use in seconds. The compact size makes it easy to keep in a first aid kit, gym bag, desk drawer, or glove box so relief is always within reach.

Each disposable pack is filled with plastic-sealed contents designed for single use, making cleanup simple with no rinsing or re-freezing required. Sold as a case of 24, this general-purpose supply is a practical choice for schools, sports teams, workplaces, clinics, and busy households that go through cold packs regularly. This item is also FSA/HSA eligible, giving you a convenient way to stock up.

How do I activate the cold pack?
Simply squeeze the pack to combine the water and calcium ammonium nitrate inside, and it will begin cooling in seconds.
Can I reuse the pack after it warms up?
No, this is a disposable single-use product. Discard it after use and grab a fresh one from the case.
How many packs come in an order?
This product is sold as a case of 24 individual 4" x 5" instant cold packs.
Is this product FSA or HSA eligible?
Yes, this cold pack is eligible for purchase with FSA and HSA funds.
Does it need to be stored in a freezer?
No, it requires no freezer or refrigeration and can be stored at room temperature until you need it.

Product Details

FSA/HSA EligibleYes
MaterialPlastic / Calcium Ammonium Nitrate / Water
SizeOne Size Fits Most
BrandDynarex
SKU4511
UPC616784451121

Key Features

  • Instant, No-Freezer Cooling: A quick squeeze activates the pack so you get cold therapy anywhere, no freezer needed.
  • Grab-and-Go Convenience: The compact 4" x 5" size fits easily into first aid kits, bags, and drawers for ready access.
  • Mess-Free Single Use: Each disposable pack is used once and tossed, with no rinsing or re-freezing to deal with.
  • Stock Up and Save: Sold as a case of 24, it keeps homes, teams, and facilities well supplied.
  • FSA/HSA Eligible: Pay with your flexible spending or health savings account for added convenience.

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