The bare basics definitely include light colored clothing made of a natural material like cotton or wool. Whites are preferred, but light brown or blue pants are acceptable. No shorts ever and wear long-sleeved shirts, even in the summer. A light colored hat to keep the sun off and plenty of sunscreen to prevent sunburn. Keep in mind that all of your clothes will get exposed to the elements, and mud, and oil.

Take two pair of shoes, one to wear each day. Standing all day can really get to your feet, and a change of shoes will help keep the feet happy.

Colors that are NEVER acceptable near the track are red, yellow, and black. Drivers who rely on their peripheral vision to see the flags might mistake a shirt in one of these colors for a flag.

Gloves are a must if the worker plans on responding. They should be made of a natural material, like leather or wool, or Nomex. The tougher they are the better, and a bright orange would be a bonus.

A loud whistle that can be used for getting the attention of other workers is necessary. If the whistle is worn on a lanyard, make sure the lanyard has a break-away feature. If it were to get caught on a car bumper, it would need to come off without breaking the worker’s neck.

Ear protection is a must! Ear plugs, shooters muffs, or something that will bring down the decibels. Workers stand for hours on end exposed to up to 103 decibels of noise, and you don’t feel yourself losing your hearing.

A hat to keep the sun off of the face and neck is a necessity as well. A full brim accomplishes this best, but you need a ball cap if you will be wearing a headset.
Sunglasses are simple enough. Right? I can’t tell you how many times I have walked 15 minutes across a facility to retrieve my sunglasses from our car. You need them, even for night races, but that’s another tale.

As time goes by, most workers tend to gradually accumulate a bag of supplies that they feel are necessities. The supplies vary widely from person to person.

A knife for cutting—fruit, packaging, zip ties, and, most importantly, seatbelts. A fireman’s hook is wonderful, but expensive. E-bay is a good source for knives and seat belt cutters. One can be found for $20-$25. Personally, I have several of them. My favorite is a folding gut hook, it retailed for about $80, and wasn’t easy to find. It would cut a seatbelt without much effort, and folds neatly into a small belt holster, and won’t scare the driver if he sees me coming at him with a hook rather than a huge blade.
One other that I really like is a glass punch for breaking glass on one end and a folding serrated knife that is used to cut seatbelts. Ken found one for each of us for about $20 on e-bay.

Chapstick, or lipstick, with sunscreen, hand cleaner, and toilet paper would be my next things to pack.

A small cooler with drinks, preferably non-caffeinated, or a thermos with a hot drink, whichever the weather dictates is a necessity for everyone. A bandana for wearing around the neck is great in hot or cold weather. In hot weather, take the bandana, and roll some ice up in it before putting it on and it becomes and instant cooling device. In cold weather, it keeps the neck warm. At all times, a bandana will keep the worker from getting a sun burnt neck.

Binoculars come in handy, but can be cumbersome. I have gone through two pair in a year. One was dropped and broken, and the other seemed to be too much of a temptation to be left in my possession.

As you can see, most of this is common sense outdoor gear. I buy Wal-Mart white jeans that run $18 a pair. I see no sense in buying $40 jeans just to wear to the track. I expect to get filthy, so I buy cheap clothes to wear.