Gillette
Gillette's business is the plastic cartridge system: a plastic handle plus a recurring plastic cartridge that fuses molded plastic, a steel blade, and a polymer lubrication strip into one non-recyclable unit. The steel edge is the only functional part, but it's wrapped in plastic that isn't curbside recyclable and is thrown away every few weeks.
How clear are their specs?
Marketing describes blade technology and comfort features but does not disclose plastic resins or make the cartridges' non-recyclability plain.
Products to avoid
Documented so you know what to skip — each still has a full breakdown and sources.