- TWISTED X. MXC0001. MENS CELLSTRETCH CHUKKA DRIVING MOC. BOMBER. The men"s casual chukka driving moc in full-grain leather features Twisted X patented CellStretch comfort technology, ensuring that every step you take is backed by superior comfort. The compression-molded EVA midsole with integrated CellStretch tech, along with a molded rubber outsole provides the unmatched stability and durability you need to carry you from one adventure to the next.