Phase 22 CryoPak (4 Pack)

Essential item for anyone shipping insects, reptiles, feeder bugs, amphibians, and temperature-sensitive material.

Cryopak Phase 22 packs are great for applications that need to maintain a controlled room temperature.

• Phase change temperature is 71.6°F (22°C )
• Provides thermal protection when shipping products at various temperatures
• When used as liquid, it acts as gentle heat source (keeping the contents warm)
• When used as solid, it acts as a heat sink (protecting the contents from heat)

High-quality product designed to undergo "phase change" (begin freezing or melting) at 71.6°F (22°C). If you think the temp inside your box might rise ABOVE this, use a frozen Phase 22 pack. It will absorb the heat energy in your box as the pack changes from solid to liquid, thereby keeping the contents of the box cooler.

If you are concerned that the temp inside your box might dip slightly BELOW 71.6°F (22°C), use an un-frozen pack. It will release its heat energy inside your box as the pack tries to "phase change" from liquid to solid, thereby keeping the contents of the box slightly warmer.

If you expect your shipment to encounter temps below 60°F, we recommend using a true Heat Pack shipping warmer in conjunction with a CryoPak.