16 Mar 2021 --- Softbox is supporting Pfizer’s COVID-19 vaccine distribution by supplying high-performance temperature-controlled parcel shippers developed specifically for Ultra-Low Temperature (ULT) applications. ULT vaccines, such as that developed by Pfizer – BioNTech, uses mRNA (messenger RNA) technology and must be stored at temperatures between -90°C to -60°C to ensure the vaccine’s quality and efficacy is maintained.