A pack of 5x Swedish stainless steel double edge blades which should last between 30-50 shaves (depending on the thickness of hair it's being used on and the size of the area) and can be recycled afterwards.
The blades are easy to change by unscrewing the razor head to get access to the blade, picking it up by the short sides (do not touch the long sharp edges, even when too dull for shaving, they will still be very sharp!), replacing it with a new blade from the pack and screwing the razor head back on.
