Safety razors were the main option for shaving before the mass production era which introduced plastic ones. Disposable plastic shaving razors are still highly popular and, unfortunately, not recyclable.
Moreover, plastic razors are not meant to last and are made of low quality materials. The multiple-blade system tries to make up for that lack of sharpness but it can drag skin cells along the way, which makes the skin irritated and causes razor burns.
This safety razor will last many years without any harm to you or the environment. It comes with a blade and a PDF user manual.
It doesn't even feel like any shaving is being done! I love it, it leaves my skin completely smooth and clean-shaved