Our Arnold trainer has a unique LACTAE HEVEA sole. Farmed in a completely sustainable, ecological way, the Hevea trees are tapped for their milk, which is then refined to produce a natural, slightly translucent gum sole – tiny bubbles of air are formed in the process producing a super flexible ‘walking on air’ comfort. The retro 1970s style upper is made from a supple, brown, antique finished calf leather and is fully lined in calf leather with a full leather cushioned insock. The heel counter is trimmed with tan calf leather with a retro grosgrain stripe on the back counter.