SkechersMen's Felton Shoe

Are these slip resistant...I don't see that listed in the product details?

Are these shoes good against oil? I work in a mexican restaurant, and slip resist shoes are a must

Is it a safety shoes ?? has a metal in sole ???

I am looking at the chart but i don not see an e. i see 2e and 3e, so what is an e? is e = wide?