To mark the 50th birthday of #sportmax, we take a look back through the decades. Here we see sketches from the '70s by the prolific talent of Jean-Charles de Castelbajac. Note the plays of proportions, colours and the concept of modernity shining through. Utilitarian layering, atypical materials, unexpected offbeat forms and an instinctive gestural approach helped pushed the brand into the futurism. Explore more on sportmax.com #SportmaxAnniversary
