Cryopak Phase 22 Pack — Phase-Change Material for Shipping Live Organisms Description: Cryopak Phase 22 packs are incredibly useful for shipping live organisms. The phase-changing material has a melting point of 22°C (71.6°F). If heated into a liquid, it acts as a heat pack and releases energy. If frozen into a solid, it acts as a heat sink and absorbs heat energy, providing a cooling effect. These packs will help stabilize any package to room temperature and can be used strategically with double boxing or in conjunction with a heat pack or cool pack. Why shippers love Cryopak Phase 22 Packs: Dual-purpose — Works as a heat pack (heated) or cool pack (frozen) depending on your needs 22°C melting point — Stabilizes packages to room temperature for safe live organism shipping Strategic use — Can be combined with double boxing or other heat/cool packs for extreme conditions Industry trusted — Used by professional shippers for live reptiles, amphibians, and invertebrates Important: Please make sure there is insulation or packing material between a cool pack and live organisms. Best for: shipping live reptiles, amphibians, invertebrates, dart frogs, tarantulas, and other exotic pets. Case shipping: 23.4 lbs, 18x12x8. Note: Ask us how to use Phase packs for your specific shipping needs!