Functional hiking shoes with lacing and TEXAPORE technology for breathability. PFC-free membrane and profiled shoe sole for grip on various surfaces. These Jack Wolfskin Vojo 3 Low Lace-Up Trainers provide a firm hold while hiking. Upper: Leather & Textile. Sole: Rubber. Please make sure that you try your footwear on before returning, as the box or label may state a US/Euro size which is different to the UK size.