Perishables are, due to their nature, usually shipped by air. | ✈️Aviation English

Perishables are, due to their nature, usually shipped by air. These products are frequently for human consumption, have a short shelf life. They will spoil or become useless outside of their correct temperature zone, they can melt if not kept frozen. Sometimes they require other special shipping considerations such as specific moisture levels or airtight packaging.
For example
fresh food like meat or seafood
frozen food items
prmaceuticals
flowers
animals