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Description
OrthoH2O Waterproof Short Arm Cast Kit — True Swim Cast Material
Complete Waterproof Cast Material Kit | Fiberglass Cast Waterproof System | Infant to Adult Sizes
OrthoH2O is not a cast cover. It is the actual waterproof cast material used to build a waterproof cast from the ground up. This complete waterproof short arm cast kit includes a water-resistant tubular stockinette underpad and fiberglass casting tape — everything your doctor or cast technician needs to apply a true swim cast for the wrist, hand, or forearm (also called a fiberglass waterproof cast system).
OrthoH2O is a hypoallergenic, thick synthetic waterproof cast stockinette manufactured from Aerosliver yarn — skin-irritation-free and water-repellent. Quick-Wick Technology allows exposure to wet conditions, and its circular-knitted fiber drains water effortlessly. The underpad contains silver (Ag), an antimicrobial ion that helps prevent bacterial growth and infections. With OrthoH2O, patients can shower, bathe, and participate in water-related activities without covering their casts.
Why Choose OrthoH2O Waterproof Cast Material?
True Waterproof Cast System — not a cover, not a sleeve. This is the actual waterproof cast material applied by your doctor.
Reduced Skin Irritation & Odor — antimicrobial fabric allows fast drying to prevent skin irritation and unpleasant odor.
Superior Comfort — soft, flexible underpad acts as a protective layer between skin and fiberglass casting tape.
Breathable Design — unique fabric blend allows skin to breathe beneath the hard cast.
Swim Cast Ready — patients can shower, bathe, and swim. A hair dryer on low dries the cast in 30 minutes or less.
Casting Tape Included — fiberglass casting tape is included in every OrthoH2O kit at no extra charge.
Color Choice — choose your fiberglass cast tape color at checkout.
✅ Everything you need to make a waterproof short arm cast is included in this kit!
Application Videos — For Patients & Doctors' Offices
Make sure your doctor or cast technician watches our application video so they know how to apply your waterproof cast correctly!
How to Apply Your Waterproof Short Arm Cast
OrthoH2O is a water-resistant tubular stockinette — slip onto the limb and double up for proper thickness.
Provide your doctor with the video instructions above so they know how to properly apply your waterproof cast.
Never use any other materials than what is provided with this kit.
Promise your doctor you will be compliant in caring for your waterproof cast and drying it after each wet exposure.
A hair dryer on a low setting can help the cast dry in 30 minutes or less.
Waterproof Short Arm Cast — Size Chart
Kit includes waterproof stockinette and casting tape. Do not use any other materials. Stockinette is doubled up for proper thickness. Stockinette comes in white only.
Patient Size
Part Number
Stockinette Width/Length
3" Cast Tape
2" Cast Tape
Infant – 3 Yrs
NUP-2100
2″ × 12″
0
2
Child 4–12 Yrs
NUP-2100
2″ × 18″
1
1
Teen 13–19 Yrs
NUP-2100
2″ × 24″
1
2
Female Adult
NUP-2100
2″ × 24″
1
2
Male Adult
NUP-3100
3″ × 24″
1
2
Frequently Asked Questions
Can I shower, swim, or bathe with a waterproof short arm cast?
Yes. OrthoH2O is designed for full water exposure — showers, baths, pools, and ocean water. After each wet exposure, use a hair dryer on a low setting to dry the cast in 30 minutes or less. Always flush with clean water after salt water or chlorine exposure.
How long does a waterproof short arm cast take to dry after getting wet?
The outside of the cast will be dry to the touch in 30–60 minutes. The inside takes 12–24 hours to fully dry. Using a hair dryer on a low or cool setting will significantly speed up the drying process.
To clean: use gentle soap and water. For odor: soak the cast in a 5-gallon bucket or bathtub. Add 1 cup hydrogen peroxide and 1 cup rubbing alcohol to help kill bacteria. Soak for 5 minutes only, then rinse with clean water and dry thoroughly.
What is the difference between OrthoH2O, AquaCast, and Delta Dry?
OrthoH2O — easy one-piece design with more breathability; does not pool water at the wrist. Casting tape is included. AquaCast — familiar to many doctors but tends to bunch up under the cast and is more difficult to apply. Delta Dry — lightweight and fast-drying but tends to tear, slip, and slide under the cast.
Will my doctor apply the OrthoH2O waterproof cast for me?
It depends on the doctor. Ask your orthopedic provider and let them know you will be fully compliant with all care instructions. You can bring the kit to your appointment or have us ship it directly to their office. We are compiling a list of doctors who work with OrthoH2O — contact us if you find one.
What is included in the OrthoH2O Short Arm Cast Kit?
Every OrthoH2O Short Arm Cast Kit includes: tubular waterproof stockinette (sized for your patient size), fiberglass casting tape in your choice of color, and gloves. Everything needed to build a waterproof short arm cast is in the box — no additional materials required.
How fast does OrthoTape ship?
We ship same day by 2 PM EST from Ridgeland, SC. Upgrade your shipping at checkout. It is best to order 1–2 days before your doctor's appointment.
Authorized OrthoH2O dealer. FSA/HSA eligible — check with your plan administrator. HCPCS: A6531. This product should be applied by a trained medical professional or for educational training. Always consult a doctor before use. A waterproof cast still requires a drying period between wet exposures — body heat and a hair dryer on a low setting help evaporate remaining moisture. Never apply fiberglass cast tape directly to the skin. OrthoTape is not responsible for improper application.
Ships same day by 2 PM EST from Ridgeland, SC 29936.
The stocking arrived torn and continued to tear but overall the cast worked like a dream. Makes life mush easier when I'm not constantly worried about getting wet
