What is the EXOS Boxer's Fracture Brace used for?

It is an ulnar gutter fracture brace (cast splint alternative) designed to stabilize fractures of the 4th and/or 5th metacarpal bones and the respective MCP joints, when prescribed by a medical provider.

How do I choose the right size?

Measure the circumference around your knuckles (excluding the thumb) with a soft tape and compare to the size chart. If you measure between sizes or want a roomier fit, sizing up is typically recommended.

Left or right — does it matter?

Yes. This product is side-specific. Choose LEFT or RIGHT to match the injured hand, along with the correct size.

Does the brace need to be heated?

EXOS braces are thermoformable and are intended to be heated and molded by trained medical professionals for best fit and safety. Typical clinical heating is 200°F (93°C) for about 3–4 minutes in an EXOS oven until pliable.

Can I get the brace wet?

The brace is water-resistant and can be cleaned; follow provider and manufacturer instructions. If the brace and skin get wet, they should not stay wet—dry thoroughly to help protect skin and comfort.

EXOS Boxer's Fracture Brace (BFB) with BOA — Ulnar Gutter Cast Splint for 4th & 5th Metacarpal Fractures

A reformable, water-resistant fracture brace (cast splint alternative) designed to stabilize the 4th and/or 5th metacarpal and MCP joints while allowing a custom-molded fit. Ideal for “boxer’s fracture” injuries when immobilization is prescribed.

Why clinicians choose EXOS for boxers’ fractures

Thermoformable / remoldable for a custom fit during swelling changes
BOA Fit System for micro-adjustable compression and quick on/off
Ulnar gutter design supports 4th/5th digits and helps position MCP joints for stability
Water-resistant & easy to clean (hand wash / dry; hair dryer is commonly used for drying)
Radiolucent material (often allows imaging without removal, per clinical protocol)

Looking for a Different Exos Brace?

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Indications

Fractures of the 4th and/or 5th metacarpal (MC) or phalanges
Injuries requiring ulnar gutter immobilization per provider direction

Key Features & Benefits

Thermoform and custom fit to the patient’s extremity for comfort and control
Dorsal hook-and-loop secure tab helps stabilize the overlapping shell
Web-space + 4th/5th digit straps can be positioned for improved stability
Finger section can be trimmed (only as directed by the physician) to accommodate ROM goals
BOA® dial provides fast, precision adjustment to help manage swelling/atrophy

Overview Video

Sizing & Fit (Important)

Measure first. Wrap a flexible tape loosely around the widest part of your hand (around the knuckles, excluding the thumb), then compare to the chart. If you’re between sizes or want a roomier fit, size up. This brace is commonly returned for being too small.

How to measure

EXOS Boxer's Fracture Brace (BFB) Size Chart

Hand Circumference

7.25" – < 8" (18.4 – < 20.3 cm)

Brace Length

10" (25.4 cm)

Left / Right Part #

325-31-1111 / 325-32-1111

Hand Circumference

8" – < 9" (20.3 – < 22.9 cm)

Brace Length

11" (27.9 cm)

Left / Right Part #

325-41-1111 / 325-42-1111

Hand Circumference

9" – < 10" (22.9 – < 25.4 cm)

Brace Length

12.25" (31.1 cm)

Left / Right Part #

325-51-1111 / 325-52-1111

Hand Circumference

10" – < 11" (25.4 – < 27.9 cm)

Brace Length

13.75" (34.9 cm)

Left / Right Part #

325-61-1111 / 325-62-1111

Hand Circumference

11"+ (27.9 cm+)

Brace Length

14.5" (36.8 cm)

Left / Right Part #

325-71-1111 / 325-72-1111

Fit tip: EXOS braces are heat-moldable, so a slightly larger size can often be molded for comfort, while a too-small brace may not fit safely.

Manufacturer chart image (reference)

EXOS Boxer's Fracture Brace size chart image

Important: EXOS braces are intended to be fitted and remolded by trained medical professionals. Heating/molding performed outside medical guidance may affect fit, safety, and warranty coverage. Many people have successfully heated these items on their own, but we cannot cover this under warranty if it is not done by a trained medical professional.

Additional Videos & Resources

Heating & Application (Typical Clinical Steps)

Open and unfold brace.
Proper heating temperature: 200°F (93°C).
Heat in an EXOS™ oven approximately 3–4 minutes (until pliable). It should not be too hot to handle comfortably.
Ensure skin is completely dry before application.
Fit brace, remove slack, then tighten BOA® dial. Do not fully tighten until brace returns to room temp to avoid indentations.
Mold into desired position; secure straps as directed.
Once hardened, tighten BOA® dial to desired tension.

Warning: The brace should not be worn too tightly. Excessive force or shear forces may affect the skin. Warranty coverage generally applies to defects in workmanship/materials; damage from misuse, abuse, or alterations is not covered.

Important purchase & fitting statement

By purchasing an EXOS brace or any accessories, you acknowledge that you are either a qualified orthopedic technician or currently under the supervision of an orthopedic medical provider who has prescribed an EXOS product directly to you. You must read and follow the manufacturer’s directions. The end-user assumes responsibility for use or misuse. OrthoTape.com is a distributor and is not responsible for injury due to malfunction, misuse, inappropriate application, or other reasons.

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OrthoTape.com is an authorized dealer and guarantees authenticity and craftsmanship. We source directly from the manufacturer.

A Wonderful Option

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As advertised

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Such an awesome product! Who would think of being able to get a cast wet

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EXOS Boxer's Fracture Brace (BFB) with BOA | Ulnar Gutter Cast Splint

Description

EXOS Boxer's Fracture Brace (BFB) with BOA — Ulnar Gutter Cast Splint for 4th & 5th Metacarpal Fractures

Why clinicians choose EXOS for boxers’ fractures

Indications

Key Features & Benefits

Overview Video

Sizing & Fit (Important)

Additional Videos & Resources

Heating & Application (Typical Clinical Steps)

Important purchase & fitting statement

EXOS Boxer's Fracture Brace (BFB) with BOA | Ulnar Gutter Cast Splint

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