First Aid Kit Refills — Which Five State an ANSI Class

Which first aid kit refill should you buy in 2026?

Short answer: First aid kit refills restock the contents of a container you already own — the same packs are sold as first aid box refills or 1st aid kit refills — so match the class and the person count of the container you are restocking. For the most common case — a 25-person ANSI Class A kit or station — the Urgent First Aid ANSI Class A Refill Kit, 25 Person is the pick: 78 pieces documented to ANSI Z308.1-2021 Class A. High-risk 50-person programs step up to the Urgent First Aid ANSI Class B Refill Kit, 50 Person, and cabinets restock in one order with the UniShield ANSI Class B First Aid Refill with Medications.

First Aid Kit Refills (2026)

Refills are the economics of a first aid program: the container — kit, cabinet, or IFAK pouch — is a one-time buy, and the fill is the consumable. This collection sits inside our First Aid Kits category and stocks 7 refill packs that restock the containers sold in Workplace First Aid Kits, the wall stations in First Aid Cabinets & Stations, and — via the CAT Gen-7 trauma refill — the bleeding control kits in Trauma Kits & Bleeding Control. New to the category? The pillar guide Which First Aid Kit Do You Need? covers the container side of the decision.

Editor's pick — Urgent First Aid ANSI Class A Refill Kit, 25 Person, 78 Pieces
The class-matched restock for the most common workplace setup: 78 pieces that bring a 25-person Class A kit or cabinet back to a full ANSI Z308.1-2021 Class A fill — for a fraction of the cost of replacing the container. (As an Amazon Associate, WC Safety earns from qualifying purchases.)

VIEW URGENT FIRST AID CLASS A REFILL → CHECK PRICE ON AMAZON →

What this collection covers

• ANSI Class A refills — the Urgent First Aid Class A Refill, 25 Person (78 pieces, documented to Z308.1-2021) and the injury-type-organized MFASCO ANSI Class A First Aid Kit Refill Pack.
• ANSI Class B refills — the 208-piece Urgent First Aid Class B Refill, 50 Person for high-risk programs, and the cabinet-scale UniShield Class B Refill with Medications.
• Factory-matched refill — the First Aid Only 90583 25-Person Refill, which restores a First Aid Only 25-person kit to its original fill.
• Economy general restock — the General Medi 160-Piece Refill Bag for soft-sided kits.
• Trauma/IFAK refill — the RHINO RESCUE IFAK Refill Kit with CAT Gen-7 Tourniquet, the 17-piece rebuild for a used or expired bleeding control kit.

Which refill matches your container?

• Buy the Urgent First Aid Class A, 25 Person if you restock a standard 25-person office or light-industrial kit and want the ANSI edition documented.
• Buy the Urgent First Aid Class B, 50 Person if your program runs Class B for a high-risk 50-person floor — 208 pieces in one order.
• Buy the MFASCO Class A Refill Pack if you want the restock organized by injury type for faster shelf sorting.
• Buy the UniShield Class B with Medications if you are restocking a 3- or 4-shelf cabinet — including the OTC medication tray — without replacing it.
• Buy the First Aid Only 90583 if your container is a First Aid Only 25-person kit and you want the factory-matched fill.
• Buy the General Medi 160-Piece Bag if you are topping up soft-sided personal or travel kits on a budget.
• Buy the RHINO RESCUE IFAK Refill if a bleeding control kit has been opened, trained with, or aged out — 17 pieces around a CAT Gen-7 tourniquet.

Shop first aid refills on Amazon → Urgent Class A 25 Urgent Class B 50 MFASCO Class A UniShield Class B Rhino IFAK Refill

How to choose a first aid kit refill

Match the class — this is the core decision

First, know that only some refills publish a class. Of the 20 refills in this collection, five state an ANSI class in their listing — two Class A and three Class B — and those are the ones named throughout this page. The other fifteen are general assortments: perfectly good for topping up consumables, but they cannot be used as evidence that a documented Class A or Class B container has been restored to its fill. If compliance documentation is the reason you are here, buy from the five; if you are simply replacing used bandages, any of the twenty will do.

A refill either keeps your container compliant or quietly downgrades it. If the kit or cabinet is documented to ANSI Z308.1-2021 Class A, restock with a Class A pack; if it is Class B, only a Class B refill like the Urgent First Aid Class B maintains the rating. Mixing a general assortment into a classed container leaves you with a box of supplies, not a documented fill — fine for a glovebox, not for an audit.

Which container does the refill fit?

Refill packs are sized to a fill, not to a box, so the same pack restocks a soft kit, a hard case or a wall unit provided the class and person count match. First aid cabinet refills are simply the larger person counts — a wall cabinet is usually a 25 or 50-person fill — and first aid only refills from that manufacturer follow the same class logic as any other brand. Where a pack is sold as factory-matched to one container, the packing list still tells you whether it meets the class; read the list rather than the model compatibility note. The full contents requirements sit in ANSI/ISEA Z308.1-2021.

Match the person count

Class alone is not enough: a 25-person refill in a 50-person station under-stocks it by half. The two Urgent First Aid packs are labeled by both class and person count for exactly this reason.

Factory-matched vs universal

Container brands sell factory refills — the First Aid Only 90583 restores a First Aid Only kit tray-for-tray, the path of least resistance for cabinets like the First Aid Only 90575. Universal class-matched packs cost the same or less and fit any container; keep their packing list as your documentation.

Don't forget the trauma layer

Bleeding control consumables expire and single-use once opened. The RHINO RESCUE IFAK Refill rebuilds a pouch in one order; component-level restocks (packing gauze, trauma dressings, chest seals) live in our Trauma Kits & Bleeding Control collection, ranked in the Best Trauma Kits & IFAKs guide.

OSHA and ANSI context for refills

OSHA 29 CFR 1910.151 requires first aid supplies to be adequate and readily available on an ongoing basis — a kit that was compliant when purchased and empty when needed fails the standard. ANSI/ISEA Z308.1-2021 defines the Class A and Class B fills your restocks are measured against. The full decode of both, including the fill tables and construction's 1926.50 rule, is in our reference explainer, OSHA First Aid Kit Requirements — this page defers all regulatory detail there.

Pairs with this collection

Refills serve the containers: kits in the Workplace First Aid Kits collection, stations in the First Aid Cabinets collection (ranked in our Best First Aid Cabinets & Wall-Mount Stations guide), and IFAKs in the Trauma Kits collection. Between full refill cycles, item-level top-ups come from Bandages & Wound Care and Burn Care.

Total cost of ownership

The refill model is the whole reason to buy a quality container once: a quality cabinet bought once plus a class-matched refill each cycle costs far less over time than replacing whole kits, and the gap widens every year. Budget one refill per container per inspection cycle (quarterly checks, restock as consumed), plus one IFAK refill per trauma kit whenever a pouch is opened. What to check, in what order, and how to record it is covered in our first aid kit inspection checklist. The General Medi bag is the cheapest way to keep soft kits from going hollow between audits.

First aid kit refill FAQ

What is a first aid kit refill?

A packaged assortment of first aid consumables — dressings, bandages, wipes, and similar — sized to restock an existing kit or cabinet to a defined fill, so you replace contents instead of containers.

How do I know which refill class my kit needs?

Check the container's label or documentation: kits sold as ANSI Class A restock with Class A packs, Class B with Class B. If the container never claimed a class, any general refill works — but the fill is then documented by your program, not the standard. Details in the OSHA first aid kit requirements explainer.

Class A vs Class B refill — what is the difference?

Under ANSI Z308.1-2021, Class A covers common workplace injuries in lower-risk environments; Class B is the larger assortment for higher-risk workplaces. The Urgent First Aid Class A (78 pieces) and Class B (208 pieces) packs show the scale gap directly.

Can a refill make a non-ANSI kit compliant?

Functionally, yes — a documented class-matched refill like the MFASCO Class A pack brings the contents to standard. Keep the refill's packing list as your adequacy evidence, since the container itself carries no rating.

Which refill restocks a wall cabinet?

The UniShield Class B Refill with Medications is sized for 3- and 4-shelf stations like those in our first aid cabinets collection; smaller stations can class-match with the Urgent First Aid packs.

Do refill contents expire?

Yes — sterile dressings, ointments, and OTC medications carry printed expiration dates. Sweep dated items at each quarterly check; refills exist so replacing an expired tray costs a fraction of replacing the station.

How often should I restock a first aid kit?

Inspect quarterly and after every recordable injury; restock whenever any category is depleted or dated. OSHA's "readily available" language applies continuously, not just at purchase.

Is a factory refill better than a universal one?

Factory packs like the First Aid Only 90583 drop into their own brand's trays with zero sorting. Universal class-matched packs fit anything and often cost less. Compliance-wise both work if class and count match.

What refills a trauma kit or IFAK?

The RHINO RESCUE IFAK Refill Kit — 17 pieces built around a CAT Gen-7 tourniquet — rebuilds a used or expired pouch in one order. Individual components are in the trauma kits collection.

How many of these refills actually state an ANSI class?

Five of twenty — two Class A and three Class B. We checked every listing. The remaining fifteen are general first aid assortments that do not claim a class, and we do not describe them as though they do. That matters because a class-stated pack is the only kind that lets you show a documented Class A or Class B container was restored to its required fill; a general assortment restocks the same consumables without carrying that evidence with it.

What is actually in a Class A versus a Class B fill?

ANSI/ISEA Z308.1-2021 defines both as minimum contents lists rather than piece counts. Class A covers 16 required item types aimed at the most common workplace injuries — adhesive bandages, gauze, tape, antiseptic, burn treatment, a triangular bandage, a CPR barrier, scissors, tweezers and so on. Class B adds to that list and increases several quantities, for larger or higher-risk workplaces; it brings the total to 24 item types including a splint, a tourniquet and additional trauma-oriented items. That is why a Class B refill is typically two to three times the piece count of a Class A pack, and why substituting one for the other is not a like-for-like swap in either direction.

Does a refill reset the expiry dates on my kit?

Only for what you actually replace. Sterile dressings, antiseptic wipes, burn gel and any OTC medications all carry their own expiry dates, and a refill resets the clock on those items alone — anything you leave in the container keeps its original date. That is the practical argument for refilling on a schedule rather than opportunistically: mixed-age contents make the kit impossible to date as a unit. Log the earliest remaining expiry after each restock and inspect against it.

Who is responsible for keeping the kit stocked under OSHA?

The employer. OSHA 29 CFR 1910.151(b) requires adequate first aid supplies to be readily available, and OSHA reads "readily available" as including stocked and usable — an expired or half-empty kit is a finding even though the container is present. The standard does not name ANSI Z308.1, but OSHA cites it as the recognized guide to what "adequate" means, which is why class-matched restocking is the defensible approach. Assign the inspection to a named person on a fixed interval and keep the record; that record is what an inspector asks for.

Can I include OTC medications in a workplace refill?

If your program allows them. The UniShield Class B refill includes an OTC medication assortment; stock only unopened, labeled products and follow their label directions. Nothing on this page is medical advice.

What is the cheapest way to keep multiple small kits stocked?

The General Medi 160-Piece Refill Bag — an economy assortment for soft-sided personal, travel, and vehicle kits like those in Vehicle First Aid Kits.