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HeatPackSource.com offers 20, 24, 30, 40, 60 and 72-hour heat packs. We suggest 40-hour heat packs or higher for reptile shipping. Reptiles are shipped FedEx Priority Overnight through our site ShipYourReptiles.com, and the 40-hour heat pack is appropriate.

To ship live reptiles or aquatics, do not use the 12- or 24-hour packs available at your local BigBox store or ski shop. Those packs are hand warmers, not shipping tools. The 12-24 hour packs don’t provide the necessary heat nor duration for a successful live shipment.

Heat packs work through a chemical reaction between the contents of the heat pack and oxygen in the surrounding air. Oxygen flow is regulated through the perforated red line. Never cover the red line with tape or anything else.

Pre-start your heat pack two hours before shipping. Shake it up well, and place it in a folded towel so it can generate a quick, solid heat. The heat pack will not heat up properly if you leave it in open air.

The heat pack must be well started before you tape it to the underside of the top insulation panel and seal your box. Remember not to tape over the perforated red line.

Note: New heat packs are soft and feel like loose powder. Used heat packs are hard. If your heat pack is hard, it has been compromised. Use a different one.