Which all are to perish with the using;) after the commandments and doctrines of men?
Which - things, namely, the things handled, touched, and tasted.
Are to perish - `are (constituted by their very nature) for perishing х fthoran (G5356), destruction by corruption] in their using up' [consumption: apochreesei (G671)]. Therefore, they cannot really and lastingly defile (Matthew 15:17-18; 1 Corinthians 6:13).
After - according to Colossians 2:20-21. All these 'ordinances' are according to human, not divine, injunction.
Doctrines х didaskalias (G1319)] - 'teachings.'