Whether you are shipping produce fresh from the farm, frozen meats to markets across the country, or hand packed meal kits to the doorsteps of hungry meal subscription customer, there is one rule that supersedes all: don’t break the cold-chain. Thermal protection is vital to keep food and produce from spoiling. Of all perishable cargo, produce, flowers, and meats are among the most susceptible to ruin. Some foods and produce loads can be kept at an acceptable temperature using only passive protection, while others may require refrigeration. Mixed loads may require a combination of passive and active protection, and for very temperature sensitive food items, secondary passive protection may be needed in addition to refrigeration to protect the load during loading times, or in case of a failed active system.