This size chart is to determine your size. If any of your measurement is on the borderline between two sizes, you can pick the smaller size for a tighter fit or the larger size for a looser fit. If your chest and waist measurements correspond to two different suggested sizes, you should order the one which is indicated by the measurement of your chest.

High Visibility:

High Visibility:

We’d love to hear from you! Please use this contact form to get a hold of us! For inquiries or assets, please shoot us an email at support@knoxfr.com.

Welcome to Knox, your number one source for safety workwear. We're dedicated to giving you the very best of fire retardant rated clothing, with a focus on three characteristics, ie: dependability, customer service and durability.

Knox is a collection of flame resistant ASTM D1230-17 NFPA 2112 apparel designed for safety, protection and durability on hazardous environments.

Knox is committed to building a different breed of company, one that reflects our core values as a team and those of our consumers. Our company’s values are committed to innovation, quality, integrity, teamwork and respect. Product quality is non-negotiable, and so is our collaborative culture and giving back to the communities we serve.

Founded in 2019 by John Miles, A Journeyman Pipefitter for 12 years, Knox has come a long way from its beginnings in Evanston, Illinois home office. The company is named after the founder’s youngest kid Damien Knox Miles. Fueled by family, when John Miles first started out, his passion for creating fire retardant clothing that is affordable and top notch quality drove him to start Knox, and gave him the impetus to turn hard work and inspiration into to a booming online store. Built on the road and by hands that knows the industry inside and out. We now serve customers all over United States, and are thrilled to be a part of the high soaring wing of the oil and gas industry.

Mission: We aim to evolve the way our oil and gas industry moves. Our main goal is to provide the best quality fire retardant clothing, both in design and functionality.

 A message from the CEO:

We strive to be the best of the best in the industry with zero tolerance to provide you with top possible products you can rely on and with prime customer service you’d expect.

We hope you enjoy our products as much as we enjoy offering them to you. If you have any questions or comments, please don't hesitate to contact us.

Sincerely,
John Miles, Founder and CEO

If you have any questions or concerns, please do not hesitate to contact us here.

Knox’s core commitment to our military communities is our deep appreciation for their sacrifice and service. We now offer 10% discount to military members and their families. Verification to be completed by our partner may take a few hours. If eligible, you will receive your discount code via email. Exclusions apply. No adjustments will be made to prior purchases.

Purchases made with this offer are not eligible for future price adjustments. Cannot be combined with any other offer or coupon code. Cannot be used to purchase gift cards. No cash value. Limit one discount code per order; Discount code may only be used one time.

Eligible individuals are limited to receiving 1 code after verification. Knox reserves the right to change or cancel this promotion at any time. Use of this promotion constitutes acceptance of these terms and conditions, except where prohibited by law.

How to measure head circumference for welding cap? Hold the end of the cloth tape measure to the middle of your forehead. If you are using a standard metallic tape measure, use a piece of string. Wrap the tape or string around your head until you return to the starting point. It should be above your ears, resting at the point you would like your hat to rest.

Make sure the tape measure or string is snug around your head, but not too tight. It should be comfortable and just fitted enough to stay put. Write down your measurement in inches. If you are using string, measure the string against your tape measure. Use the size chart above to determine which size will be your best fit. If you are between sizes, choose the larger size.

Chest: Measure the total circumference of your chest at its fullest point, just under your armpit.

1. Waist: Place your hands on your hips and bend to the side. The indent on your side as you bend is your natural waist. Measure the total circumference at this point.
2. Waist Jeans: Measure your circumference at a point about two inches below the belly button.
3. Hip: Stand with your feet 6” apart. Measure the total circumference at the fullest point of your hip.
4. Sleeve Length: With your elbow slightly bent, starting at your middle neck bone, measure to the point of your shoulder and down to your wrist bone. Or take a shirt that fits well and take the same measurement.
5. Inseam: Stand with your feet 6” apart. Measure from the top of the leg/crotch to below the ankle. Or take a pair of pants that fit well and take the same measurement. 

Body measuring tips:

• Generally, take measurements in an unflexed state and before your workout.
• Keep the feet together, relax your muscles and stand up straight.
• Consistency is essential - measure under the same conditions and using the same measuring equipment each time.
• Pull the tape tight, keeping pressure against (but not pinching) the skin and ensure the tape is kept level and not at an angle.
• To make sure the tape is positioned correctly, ideally, get someone else to take the measurements for you. If this isn’t possible take the measurements yourself in front of a mirror for better visibility.
• Measure both sides of the body to accurately track progress and symmetry.
• Always measure on bare skin and not over clothing.

How to measure head circumference for welding cap? Hold the end of the cloth tape measure to the middle of your forehead. If you are using a standard metallic tape measure, use a piece of string. Wrap the tape or string around your head until you return to the starting point. It should be above your ears, resting at the point you would like your hat to rest.

Make sure the tape measure or string is snug around your head, but not too tight. It should be comfortable and just fitted enough to stay put. Write down your measurement in inches. If you are using string, measure the string against your tape measure. Use the size chart above to determine which size will be your best fit. If you are between sizes, choose the larger size.