Hot and Cold Packs by the Case: Instant, Gel, Covers

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  1. Hot and Cold Pack Cover, Fits 4 x 5 in, 5 Bags of 100
    $120.00
    Hot and cold pack covers from Dynarex: non-woven polyester, sized to fit a 4 × 5 in pack, 100 covers to a bag, 5 bags to a case. Key features • Fits a 4 × 5 in…
  2. Hot and Cold Gel Pack, Reusable, 4 x 6 in, Case of 24
    $22.00
    Reusable hot and cold gel packs from Dynarex: 4 × 6 in, 24 packs to a case. Key features • Reusable • Chill in the freezer or warm in the microwave • 4 × 6 in,…
  3. Instant Cold Pack, 4 x 5 in, Case of 24
    $15.00
    Instant cold packs from Dynarex: 4 × 5 in, single use, 24 packs to a case. Key features • Turns cold when squeezed; no freezer needed • 4 × 5 in, flexible…
  4. Instant Cold Pack, DynaSafety, 4 x 5 in, 72 Boxes of 1
    $62.00
    Instant cold packs from Dynarex's DynaSafety line: 4 × 5 in, single use, one pack to a box, 72 boxes to a case. Key features • Turns cold when squeezed; no…
  5. Hot and Cold Pack Cover, Fits 4 x 6 in, 5 Bags of 100
    $120.00
    Hot and cold pack covers from Dynarex: non-woven polyester, sized to fit a 4 × 6 in pack, 100 covers to a bag, 5 bags to a case. Key features • Fits a 4 × 6 in…
  6. Hot and Cold Gel Pack, Reusable, 5 x 11 in, Case of 24
    $46.80
    Reusable hot and cold gel packs from Dynarex: 5 × 11 in, 24 packs to a case. Key features • Reusable • Chill in the freezer or warm in the microwave • 5 × 11…
  7. Instant Cold Pack, DynaSafety, 4 x 5 in, 36 Boxes of 2
    $62.00
    Instant cold packs from Dynarex's DynaSafety line: 4 × 5 in, single use, 2 packs to a box, 36 boxes to a case. Key features • Turns cold when squeezed; no…
  8. Hot and Cold Pack Cover, Fits 5 x 9 and 6 x 9 in, 5 Bags of 100
    $130.00
    Hot and cold pack covers from Dynarex: non-woven polyester, sized to fit a 5 × 9 or 6 × 9 in pack, 100 covers to a bag, 5 bags to a case. Key features • Fits a…
  9. Hot and Cold Gel Pack, Reusable, 6 x 9 in, Case of 24
    $46.80
    Reusable hot and cold gel packs from Dynarex: 6 × 9 in, 24 packs to a case. Key features • Reusable • Chill in the freezer or warm in the microwave • 6 × 9 in,…
  10. Hot and Cold Pack Cover, Fits 4.5 x 12 in, 5 Bags of 100
    $130.00
    Hot and cold pack covers from Dynarex: non-woven polyester, sized to fit a 4.5 × 12 in pack, 100 covers to a bag, 5 bags to a case. Key features • Fits a 4.5 ×…
  11. Instant Cold Pack, 5 x 9 in, Case of 24
    $25.00
    Instant cold packs from Dynarex: 5 × 9 in, single use, 24 packs to a case. Key features • Turns cold when squeezed; no freezer needed • 5 × 9 in, flexible…
  12. Instant Cold Pack, Urea, 4 x 5 in, Case of 24
    $19.00
    Instant cold packs from Dynarex, filled with urea and water: 4 × 5 in, single use, 24 packs to a case. Key features • Urea and water inside • Turns cold when…
  13. Instant Cold Pack, Urea, 5 x 9 in, Case of 24
    $25.50
    Instant cold packs from Dynarex, filled with urea and water: 5 × 9 in, single use, 24 packs to a case. Key features • Urea and water inside • Turns cold when…
  14. Perineal Cold Pack, Instant, Adhesive Strip, 4.5 x 12 in, Case of 24
    $50.00
    Perineal cold packs from Dynarex: 4.5 × 12 in, single use, with a self-adhesive strip, 24 packs to a case. Key features • Self-adhesive strip on the back • 4.5…
  15. Instant Hot Pack, 5 x 9 in, Case of 24
    $24.00
    Instant hot packs from Dynarex: 5 × 9 in, single use, 24 packs to a case. Key features • Turns warm when squeezed; no microwave needed • 5 × 9 in, flexible…
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Hot & Cold Packs

Hot and cold packs from Dynarex, sold by the case: instant cold packs and an instant hot pack that start when squeezed, reusable gel packs for the freezer or microwave, and disposable covers sized to fit most of them.

Every item ships as a full case, never a broken case. Each product page states its own size, material and count, and links a Dynarex sell sheet or safety data sheet.

Buying guideWhich shelf, and how it is packed

What is in this range

Hot and cold packs from Dynarex and its DynaSafety line: single-use instant cold packs in 4 × 5 and 5 × 9 in, filled with calcium ammonium nitrate or with urea; a long, narrow perineal cold pack with a self-adhesive strip; a single-use instant hot pack; reusable hot and cold gel packs in three sizes; and non-woven polyester covers sized to fit most of them.

Choosing a shelf

Instant cold and hot packs holds the single-use packs that start when squeezed. Reusable gel packs holds the gel packs you chill or warm and use again. Pack covers holds the disposable covers, one size for each pack size except the 5 × 11 in gel pack. Use each as directed on its label.

How it is packed

The gel packs and most instant packs come 24 to a case. The DynaSafety cold packs come 72 to a case, in boxes of 1 or 2. The covers come 100 to a bag, 5 bags to a case.

Common questions

Can I order less than a full case? No broken cases. Everything ships as a full case, in the quantity on its product page.

Are these latex-free? The packs, and the 4 × 5 in and 5 × 9 and 6 × 9 in covers, are not made with natural rubber latex. Dynarex does not state latex for the other two covers.

Is Med Supply Lab an authorized Dynarex reseller? Yes. Every item in this range is Dynarex.

Who orders hot and cold packs

EMS and ambulance services · school, workplace and athletic first aid · hospital and health-system supply rooms · urgent care and physician offices · long-term care and skilled nursing · distributors and kit assemblers

What our customers say

“Great customer service! Easy delivery! Thank you Raj for being responsive”

Raisa K, Google review, October 2026

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