The lot is fuel, metal, and steps. The shoe is whatever still has tread and a toe. This is not a safety certification and not medical advice about feet.
What to check on the pair and on the listing
Look at the sole. If the tread is gone, the shoe is done, no matter the brand story. A listing may claim a slip-resistant rating. Read the letters it actually prints. We did not run a lab on a sole, and a rating is not a promise about a diesel spill.
A closed toe matters around a step, a dock, and a trailer door. Sandals are a shower-stall tool. They are a poor default for the lot. The shower guide is where camp shoes belong.
A heel that is still a heel helps on a ladder rung. A completely flat, worn sole slides. You do not need a fashion boot. You need a sole that has not been polished smooth by a year of pedals.
Keep a dry pair. The pair that walked through the island should not be the pair on the pedals for the next ten hours if you can avoid it. A small mat at the door, covered in the rain-day note, saves the floor.
On a phone, this table moves sideways. The first column stays put.
Lot shoes versus cab shoes.
Pair
Use
Retire when
Closed toe with tread
Lot, step, dock
The tread is gone or the toe is open
Defined heel
Rungs
The sole is slick
Second, dry pair
Driving after a wet walk
It is soaked and has become the only pair
Conclusion
Replace the pair when the tread is gone. A logo does not put tread back on a sole.
FAQ
Which ASTM mark should I buy?
The one your carrier asks for, if they ask. This page will not invent a code. Read the listing and the fleet memo.
Are the shower sandals enough for fuel?
No. They are for the stall. The lot wants a closed toe.