Uniform and Equipment Rules

By 4Football Staff · October 21, 2026 · 10 min read

What a football player must wear, what he may not, how helmets are certified, and what happens when a helmet comes off or a rule about gear is broken.

A ball carrier is hit near the sideline and his helmet flies off. He runs a few more steps, then the referee blows the whistle and signals that he must leave the game for at least one play. In another game, a defender gets a penalty because a towel hangs from his waistband in the wrong way. In a third, a team is stopped from taking the field because a player's thigh pads are missing.

Football looks like a game of speed and strength, but it is also a game of rules about clothes. Some of those rules are about safety, some about fairness, and some about presentation. This guide explains the main categories: the equipment every player must wear, how helmets are tested, the jersey and pants rules, what is banned, and what officials do when a rule is broken.

Equipment rules are among the most frequently revised in football, and they differ between the NFL, college football under the NCAA, and high school football under NFHS rules as adopted by each state association. We describe the general principles and flag where the specifics vary, but the official rule book for your level is the final authority. If you are a parent or coach, your league or association will also have its own checklists.

The required equipment

At nearly every organized level, football requires a player to wear a standard set of protective gear on the field.

1. A helmet with a face mask and a chin strap.
2. A mouthguard, required at the college and high school levels and in most organized youth leagues.
3. Shoulder pads.
4. Hip pads and a tailbone pad.
5. Thigh pads and knee pads.
6. Cleats or shoes, with rules on the type of cleat.
7. A jersey and pants that meet the league's uniform standards.

The NFL requires the full set of padding, including thigh and knee pads, which it made mandatory at the start of the 2013 season after years of the pieces being optional. Players who skip padding without a medical reason can be fined. College and high school rule books have long required the full set. A player who arrives without a required item is not permitted to play until he has it.

The role of the officials

Officials check equipment before the game. In the NFL and college football, the umpire is the member of the crew most responsible for equipment, and the crew inspects players' gear before kickoff and as needed during the game. In high school football, the game officials do the same, and many state associations also ask coaches to confirm that their players' equipment meets the rules. A coach who knowingly sends an illegally equipped player onto the field can be penalized under the rules for his level.

Helmets: who sets the standard

The helmet is the most regulated piece of equipment. A few facts help to explain the system.

• In college and high school football, helmets must carry a certification from NOCSAE, the National Operating Committee on Standards for Athletic Equipment. The standard is a laboratory test, and a helmet that does not carry a current certification is not allowed on the field.
• The NFL and its players' union have also run laboratory testing of helmet models and have published results for players to consider. The league has restricted the use of certain helmet models that tested poorly. The details are updated regularly.
• A helmet is not a guarantee against injury. Manufacturers and safety organizations are consistent on that point: no helmet can prevent every concussion. Our guide to the NFL concussion protocol describes how the league handles head injuries on the field.

Helmet fit and care

A helmet is only as good as its fit. A correctly sized helmet sits snugly on the head, with the chin strap fastened, and the face mask positioned so the player can see clearly. Helmets are typically reconditioned and recertified on a regular schedule, and manufacturers state how long a model should stay in service. For youth and high school programs, the athletic director or equipment manager typically keeps the records. Parents who buy a helmet outside the school program should check the certification label and the age of the helmet.

Helmet add-ons

Some leagues require or permit extra padding on the outside of the helmet. The NFL has required soft-shell covers on practice helmets at times, particularly for certain positions, as part of its efforts to reduce contact injuries during practices. The requirement is revised periodically, so check the league's current rules.

Uniform rules: jerseys, pants and numbers

The uniform rules are about three things: safety, identification and uniformity.

Jerseys

The jersey must be in good condition and worn as designed. It covers the shoulder pads, and the rule books do not allow a player to cut or alter it in ways that expose his midsection or change how it fits. Fit matters for fairness as well as appearance, since a jersey that is cut very tight is harder for an opponent to grab.

Numbers

Numbers are not only decoration. They tell officials who is eligible to catch a pass and who is not, and they let the crew identify the player in a penalty. The rules for which numbers can be worn at which positions are covered in our guide to the football numbering system, and the related question of eligible and ineligible receivers is covered in eligible and ineligible receivers: positions and numbers.

Pants and pads

Pants must cover the knees and hold the pads in place. At every level, a player's thigh and knee pads are required to be worn under or inside the pants, not outside. Pants with padding that is not secured can fall out and are treated as an equipment violation.

Socks, tape and sleeves

Socks must be solid colored or follow the team's design, and visible tape is limited by color rules. The NFL and the NCAA have rules about the color of tape on wrists and fingers, and about logos and slogans that appear on equipment. Rules on whether players can write messages on their eye black or tape, and what messages are allowed, are set by the league or the conference and change from year to year.

What is banned

Every rule book contains a list of items players may not wear. The following are the common categories.

• Hard or sharp objects that could injure another player. A cast or brace with hard parts must be covered with soft padding that meets the rule book's thickness requirement.
• Jewelry such as necklaces, rings and earrings. At the college and high school levels, jewelry is banned for safety reasons, and at the NFL level it is restricted.
• Slippery or sticky substances. Players may not apply foreign substances to their bodies or uniforms to make themselves harder to tackle or easier to catch with. The NFL banned sticky substances on bodies and uniforms in the early 1980s. Gloves with a tacky grip are allowed, because they are manufactured for the purpose and approved.
• Hard-sided items on the outside of the uniform, such as pads that stick out beyond what the rule book allows.
• Unapproved communication devices on the field. At the high school level, electronic communication devices between the sideline and players are prohibited. In the NFL, a radio receiver is built into the helmet of one offensive player and one defensive player on a team, marked with a green dot, but it shuts off at a set point before the snap. College football has been moving toward helmet communication in recent years, so check the current rule.
• Visors that violate the rule. The NFL and NCAA allow clear or tinted visors under conditions, sometimes requiring a medical reason for tinted ones. High school rules are stricter in many states and require clear visors unless a medical exemption exists.

Shoes, gloves, towels and other small items

The smaller pieces of equipment draw their own rules.

• Footwear. Cleats must not have metal parts or sharp edges that could cut an opponent. High school rule books and state associations often add detailed requirements for cleat construction, so a new pair of shoes should be checked against the association's list.
• Gloves. Gloves are legal at every level, and many receivers and linemen wear them. Gloves that are designed with a tacky grip are allowed because they are manufactured and sold for that purpose, unlike substances applied to the skin or uniform.
• Towels. Players may carry a towel at the waist to dry their hands, but the rule books regulate its size and placement, and a towel that hangs loosely or is used to obscure a number can draw a warning or a penalty.
• Eye black and tape. Eye black is allowed. Messages written on it or on tape are limited by league and conference policy, which changes from year to year.
• Braces and casts. Medical devices are generally allowed if they are covered with the soft padding that the rule book requires and approved by the officials before the game.

What happens when a helmet comes off

Almost every fan has seen a helmet fly off during a play. The rule that follows is simple but surprising to many viewers.

• If a ball carrier's helmet comes completely off, the play is generally ruled dead at that point in the NFL, and other levels have similar protections. If another player's helmet comes off, the play usually continues until the whistle unless officials stop it for safety.
• After the play, the player must leave the game for at least one down if the helmet came off because of ordinary contact. The NFL, NCAA and NFHS follow this principle, though the details differ.
• If the helmet comes off because of a foul by the opponent, such as a face mask, the player may not have to leave, because the cause was not his equipment.
• A player who removes his own helmet on the field of play, other than in an authorized situation such as an injury timeout, may be penalized for unsportsmanlike conduct. Our guide to unsportsmanlike conduct and taunting explains the penalty.

Exact wording differs by level, so coaches should read the helmet-loss rule in their own rule book. In every version, safety takes priority over the run.

The football itself

The ball is equipment too. A few facts that are consistent and stable:

• The NFL's rule book sets the inflation of its footballs at a range of 12.5 to 13.5 pounds per square inch, and the weight of the ball at 14 to 15 ounces.
• The home team usually supplies the balls used for offense in the NFL, and the league supplies separate balls for kicking.
• College and high school balls differ in size and inflation from the NFL ball, and youth leagues use smaller balls to fit smaller hands.

Our article on the evolution of the football itself tells the story of how the ball's shape changed over time, and our article on the history of the football uniform shows how the clothes changed.

Penalties for equipment violations

An equipment violation does not always mean a penalty. The most common consequences are:

1. The player is not allowed to take the field until the problem is fixed.
2. The player must leave the field for at least one play if he has an equipment problem during the game, such as a missing shoe or a torn jersey.
3. A penalty for illegal equipment or an illegal uniform may be charged to the team, usually 5 or 15 yards depending on the nature of the violation and the level.
4. A fine from the league, in the NFL, for violations of uniform and equipment policy.
5. A suspension or forfeit risk in high school, where a team that plays an ineligible or illegally equipped player can be penalized by the state association.

Quick comparison by level

What parents and players should do

If you are buying equipment for a young player, a few practical steps help.

• Ask the program first. Many schools and leagues supply helmets and pads. Buying a helmet on your own may not be allowed.
• Check for current certification. A helmet should have a NOCSAE label and a recent reconditioning date if it is not new.
• Get a fitting. Equipment managers and athletic trainers know how to size helmets and shoulder pads.
• Replace worn items. Cracked shells, damaged face masks and pads that have lost their cushioning should not be used.
• Follow the instructions. Never modify a helmet, for example by drilling holes or adding stickers that the manufacturer prohibits.

For recreational players, the Play section of this site is a good place to start, and the high school directory can help you find your local program. For rules that apply in every level of football, our guide to rule differences by level gives a side-by-side comparison. You can also follow games on the live scores page and see how teams present themselves on the teams pages.

The short version

• Every organized level requires a helmet with a face mask and chin strap, shoulder pads, hip and tailbone pads, thigh pads and knee pads; the college and high school levels also require a mouthguard.
• Helmets are certified by NOCSAE at the college and high school levels, and the NFL runs its own laboratory testing.
• Numbers are rules, not decoration, because they determine eligibility.
• Banned items include hard objects, jewelry in most levels, sticky substances and unapproved communication devices.
• A player whose helmet comes off by ordinary contact generally has to leave the game for a play.
• Equipment violations can bring a penalty, a fine or a suspension, depending on the level.
• Always check the current rule book and your league or state association for specifics.