One of our most popular styles, the Bison is made from full grain cowhide and quadruple stitched for extra strength. The cutaway collar and soft padded tongue offer greater comfort, and weメve added a speed lacing system for convenience. lining – v brelle moisture wicking lingin for day long comfort tongue – new soft edge quilted tongue laces – no hooks safety lacing system stitching – quadruple sticthed vamp for extra strength upper – full grain leather or nubuck are used for tough supple uppers with good breathability toe cap – composite toe caps midsole – flexible steel midsole in al vr6 styles shank – the integral steel shank ensures that the vr6 flexes where it should hell breast ladder grip – defined heel for stability on ladders heel – leather back stay to strengthen back of boot back – ergonomic collar for comfort when driving