The Blue Spirit collection consists of functional items for everyday use. Each material in the Montblanc Blue Spirit collection is recycled. The main fabric used is a recycled nylon material called 'ECONYL ®' - a durable nylon thread made from recycling. The soft calfskin leather has been produced with a CO2-neutral tanning process and the steel is 100% recyclable. The buckle closures of some items have been made from 100% recycled plastic.