Tandem Sport 34-47 / O2 Occupational footwear that has leg-supporting sole with full-length shock-absorbing C2 insole. Tandem Sport 34-47 / O2 Occupational footwear without toe-cap with velcro closure and leg-supporting sole. Detachable full-length shock-absorbing insole. Tandem sport geox 36-47/O2 New occupational shoe without steel toe-cap. Leg-supporting sole. Detachable full-length heat-regulating C2-shock-absorbing insole.