- Upper in ChromeFree leather- Panels in ChromeFree leather- Side V Logo made from Rubber and rice waste (22%)- Outsole made from Amazonian rubber (19%), rice waste (23%)and recycled rubber (22%)- Insole made from Sugar cane, Amazonian rubber,recycled EVA & organic cotton- Lining Tech (100% recycled polyester)- Velcro in ChromeFree LeatherThe ChromeFree leather is smooth and light. Coming also from the farms located in the south of Brazil (Rio Grande do Sul), it undergoes an innovative tanning process where no chrome,heavy metals or dangerous acids are involved. By simplifying the tanning process, the use of chemicals and energy is limited, the use of water is reduced by about 40% and the use of salt by 80%. After tanning, the water is recyclable. ChromeFree leather is used on all Campo & Recife models, such as on the entire leather KIDS collection. Made in Brazil.On some models, the lining TECH is made of 100% recycled polyester. It has been improved to acquire better resistance to friction and provide maximum comfort and flexibility due to its knit structure. This lining is used for the Running line in particular. Made in Brazil