First Aid Kits: The Definitive Buyer's Handbook

Before You Buy

Five Questions to Answer First

The Basics

What Actually Belongs in a First Aid Kit

A first aid kit provides the supplies to handle common, minor injuries at home until professional medical care is available if needed. It is not a substitute for emergency medical services, and it is not a trauma kit. It covers the gap between the moment something happens and the moment trained help arrives, or, more often, the moment you realize that a bandage and some antibiotic ointment are all the situation required.

The American Red Cross and the American Heart Association jointly published updated first aid guidelines in 2024, their first full update since 2010.1 Among their recommendations: every household should maintain a first aid kit and tailor its contents to the setting and activities the household engages in.

The Red Cross publishes a recommended minimum contents list for a family-of-four kit.2 It includes 25 adhesive bandages in assorted sizes, two absorbent compress dressings, adhesive cloth tape, five antibiotic ointment packets, five antiseptic wipes, two packets of aspirin, an emergency blanket, a breathing barrier with a one-way valve, an instant cold compress, two pairs of nonlatex exam gloves, hydrocortisone ointment, gauze rolls and sterile pads in multiple sizes, two triangular bandages, tweezers, an oral thermometer, and a first aid instruction booklet.

That list is a minimum. It represents the floor, not the ceiling. The Red Cross also recommends including any personal items such as medications, emergency phone numbers, or other items a healthcare provider may suggest.2

Standards Decoded

What ANSI Classes and Types Mean on the Label

Many kits advertise "ANSI compliant" or "Class A" or "Class B" on the box. These refer to ANSI/ISEA Z308.1-2021, a voluntary consensus standard published by the International Safety Equipment Association that sets minimum contents for workplace first aid kits.3 The standard is designed for workplaces, but it provides a useful benchmark for evaluating any prebuilt kit.

Class A kits address the most common types of injuries: minor cuts, abrasions, minor burns, and eye irritation. They contain adhesive bandages, gauze pads, antiseptic packets, burn dressings, exam gloves, scissors, a cold compress, a foil blanket, hand sanitizer, and a first aid guide, among other items. A Class A kit is the minimum for most workplaces and a reasonable baseline for a household kit.

Class B kits contain the same categories of supplies in greater quantities and are intended for environments with higher-risk hazards or larger numbers of people. A Class B kit is what you might see in a construction site trailer or a factory floor.

The standard also classifies kit containers by type. Type I kits are wall-mountable. Type II are portable. Type III are wall-mountable and weather-resistant. Type IV are portable and weather-resistant, designed for outdoor and mobile work where the supplies face rough handling and environmental exposure.4

One important note: OSHA identifies ANSI Z308.1 as a source of guidance for workplace kit contents, but the standard is voluntary and has not been adopted as an OSHA regulation.5 A household kit does not need to carry an ANSI label to be adequate, and carrying one does not automatically mean the kit is right for your home. What matters is whether the contents match the injuries your household is likely to encounter.

The Gap

What Prebuilt Kits Typically Leave Out

Prebuilt kits are a starting point, not a finished product. Even well-regarded kits from reputable manufacturers share a common set of gaps, and understanding those gaps before you buy saves you from discovering them when they matter.

Prescription medications. No prebuilt kit can include the medications your household actually takes. If anyone in the family uses an EpiPen, an inhaler, insulin, or any prescription that might be needed in an urgent moment, that goes in the kit after you buy it. The Red Cross recommends including personal medications and emergency phone numbers alongside the standard contents.2

Pediatric doses. Most kits include adult-strength aspirin or acetaminophen, if they include any medication at all. Households with children need pediatric-appropriate options, and those need to be sourced and stocked separately.

A current medication list. In a medical emergency, the first thing a responding paramedic wants to know is what medications the patient takes. A printed, current medication list for each household member, stored in the kit, costs nothing and can matter more than any supply in the box.

Quality shears. Budget kits often include small, dull scissors that struggle to cut clothing or medical tape under stress. A pair of trauma shears with an angled tip handles both tasks reliably and costs a few dollars.

A CPR pocket mask. The Red Cross kit list includes a breathing barrier with a one-way valve, but many prebuilt kits omit it. A pocket mask protects both the rescuer and the patient. It is small, light, and only useful if you have taken a CPR class, which is itself worth doing.

Matching the Kit to Your Life

Home, Vehicle, Travel, and Outdoors

The Red Cross recommends keeping a kit at home and in each vehicle, and carrying one or knowing where to find one when away from both.2 That does not mean every kit needs to be the same size or carry the same contents. The setting shapes what you need.

Home kit. This is your primary kit and should be the most complete. It can be larger and heavier because it does not travel. Keep it in a central, accessible location that every adult in the household knows. Not behind the cleaning supplies. Not on a high shelf a child cannot reach in an emergency while adults are incapacitated. Accessible means findable by anyone in the household under stress.

Vehicle kit. A car kit sits in a trunk that reaches well over 100 degrees Fahrenheit in summer and drops below freezing in winter. Temperature-sensitive items like ointments and cold packs degrade faster in these conditions. Choose a kit with a hard case or durable soft case, inspect it more frequently, and replace heat-damaged contents promptly.

Travel kit. TSA restricts scissors and sharps in carry-on luggage. A travel kit should be compact, TSA-compatible for the bag it rides in, and focused on the most common travel injuries: blisters, minor cuts, headaches, stomach upset, and allergic reactions.

Outdoor and hiking kit. Weight matters, waterproofing matters, and the distance from medical care changes the calculus. A backcountry kit should include a SAM splint, a larger quantity of wound-closure strips, and moleskin for blisters. If you are more than an hour from a trailhead, the kit needs to be capable enough to stabilize someone for a carry-out. This is where first aid training becomes a significant force multiplier.

After the Purchase

What Expires, When to Replace It, and How to Maintain the Kit

A first aid kit is not a one-time purchase. It is a system that needs periodic inspection and restocking. The Red Cross recommends checking your kit regularly and replacing any used or out-of-date contents.2

Items with printed expiration dates include antibiotic ointment, hydrocortisone cream, antiseptic wipes, instant cold packs, aspirin and other medications, and hand sanitizer. These should be replaced before or at their expiration date.

Items that degrade without a printed date include adhesive bandages, which lose their stickiness over time, and adhesive tape, which can dry out or become brittle. Sterile gauze packaging can lose its seal. Exam gloves can become brittle or tacky with age.

A practical schedule: inspect your kit every six months. A good trigger is the same weekend you check your smoke alarm batteries. Open the kit, check dates, replace anything used or degraded, and verify that the personal items (medication list, emergency contacts) are still current. ANSI/ISEA Z308.1-2021 requires that any supply beyond its marked expiration date be discarded and replaced.3

When you use something from the kit, replace it immediately. The most common failure mode of a household first aid kit is not that it lacked the right supplies on day one; it is that someone used the last bandage three months ago and no one restocked.

Making It Yours

How to Customize a Kit for Your Household

The best approach for most households is to buy a prebuilt kit from a reputable manufacturer and then add the items specific to your family. Building a kit entirely from scratch is possible but time-consuming, and a prebuilt kit gives you a baseline of organized, unexpired supplies in a case designed to keep them accessible.

After you bring a kit home, open it. Lay everything out. Read the first aid guide it includes, or download one from the Red Cross. Then add the items that no manufacturer can include for you: your family's specific medications, emergency contact cards for each member, a current medication and allergy list, and any items your physician recommends.

Consider upgrading the weakest components. Budget kits often include small, thin bandages and barely functional scissors. Replacing these with quality adhesive bandages and a pair of trauma shears transforms the kit from adequate to actually useful. A digital thermometer, if the kit did not include one, is worth adding.

Finally, tell your household where the kit lives. A first aid kit that only one person can find is a first aid kit that fails when that person is the one who needs it. Walk each family member to the kit, show them how to open it, and make sure every adult and older child knows the location.

The Other Half

Why a Kit Without Training Is Only Half the Answer

The 2024 AHA/Red Cross guidelines emphasize that the first step in any first aid response is deciding to act, and that training improves both the decision and the response.1 A kit supplies the materials; training supplies the confidence and the knowledge to use them correctly.

A basic first aid and CPR course from the Red Cross, the American Heart Association, or a local community organization typically runs a few hours and costs under $100. Many employers offer them free. The skills covered include wound care, burn management, choking response, and CPR, and they correspond directly to the supplies in a first aid kit.

You do not need to be certified to use a first aid kit. But a person who has taken a four-hour class will use the same kit more effectively, more calmly, and with better outcomes than a person who has not. If you are investing in a kit, consider investing the same afternoon in a class.

Our Picks

First Aid Kit Comparisons

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After You Buy

Put the Kit to Work

A kit is a starting point. These guides help you build the medical readiness around it.

Sources

1. American Heart Association and American Red Cross, "2024 Focused Update for First Aid," cpr.heart.org. Accessed August 3, 2026.
2. American Red Cross, "Make a First Aid Kit: What to Include," redcross.org. Accessed August 3, 2026.
3. ANSI/ISEA Z308.1-2021, "Minimum Requirements for Workplace First Aid Kits and Supplies," International Safety Equipment Association. Accessed August 3, 2026.
4. ANSI Blog, "Workplace First Aid Kits: ANSI/ISEA Z308.1-2021 Classes, Types, and the Standard," blog.ansi.org, July 15, 2025. Accessed August 3, 2026.
5. Cintas, "ANSI/ISEA Z308.1-2021 Updates," cintas.com. Accessed August 3, 2026.