One to 2 tablespoons on the center of the fleece, 1 inch of dry edge, and a first session of 20 to 30 minutes while awake
The Castor Fix Pack and Wrap is a reusable external abdominal wrap, handcrafted and sewn in the USA, that holds an oil-treated organic fleece liner against the body behind a PUL barrier.
The Castor Fix is priced at $299.99 and is an adjustable one-size design, with a front pocket for optional warmth and long lower ties that can be trimmed. Its Materials and Construction list has 6 entries: an organic fleece liner, a waterproof breathable polyurethane laminate (PUL) outer barrier, baby-certified snaps and elastic, flexible corset boning, extra-long adjustable straps, and a prewashed and preshrunk liner.
The page lists the PUL as supplier-specified free from 12 substances, including PFOS, PFOA, lead, dioxins, heavy metals, BPA and DEHP, and ties those exclusions to the supplier's material records. The replacement Organic Bamboo/Cotton Fleece Liner is $35 and snaps into the same pattern; the page lists rotation, a spare while another liner dries, and a separate liner for each person as its uses.
The first 5 of the liner page's 7 preparation steps for a new liner:
The liner page states that it is easier to add more oil than to remove excess, and over-saturation increases leakage, staining, cleaning difficulty and the chance of skin irritation. A properly stored liner may be reused for several sessions, with 4 checks before each one: surface, smell, snaps and fabric. If the center is still lightly saturated, add a small amount rather than re-soaking it, and keep the 1-inch perimeter drier to reduce seepage past the outer barrier.
The FAQ calls the wrap leak resistant, not leakproof, and names 4 causes of leakage: excess oil, wet edges, damage and poor fit.
The product page's fitting sequence has 6 steps:
The page sets the fit test: the wrap should keep contact without limiting breathing, compressing the abdomen, causing numbness or creating painful pressure. Trim the long ties only after confirming the fit in more than 1 body position. Begin with a session of about 20 to 30 minutes while awake and check the skin. The FAQ allows quiet household activity or gentle walking in the wrap when it stays secure, and asks first-time users to stay awake during their sessions.
The front pocket holds 1 of 2 heat sources. A heating pad must be a compatible device used on its lowest comfortable setting, with the skin checked regularly, and the page states never to sleep with an electric heating pad turned on. A warm-water bottle must hold warm, not boiling, water, be checked for leaks, and come out if the skin becomes painful or very red.
Heat is excluded over numb skin, neuropathy, impaired circulation, damaged skin, or any area where temperature cannot be judged normally. The page lists 6 places the pack does not go at all: broken, infected, irritated or freshly shaved skin; fresh surgical incisions; unexplained abdominal masses; severe or acute abdominal pain; areas with reduced sensation; and skin reacting to castor oil or the wrap materials. It lists pregnancy, trying to conceive, recent abdominal or pelvic surgery, impaired circulation or neuropathy, and a serious medical condition as reasons to ask a clinician before use. The page adds 1 more rule: castor oil is not taken by mouth in this routine.
Between sessions, the liner page's storage steps for an oil-treated liner are: allow the liner to cool, cover the treated surface, place it in a sealed oil-resistant container, store it in a cool location, refrigerate when practical for longer storage, and return it to room temperature before skin contact.
The liner page's cleaning sequence has 7 steps:
The page states that moisture trapped in a closed container can encourage odor, mildew and microbial growth, so water-damp fleece is not sealed. It lists 6 reasons to replace a liner: a persistent rancid odor after cleaning, mold or mildew, damaged fleece, loose or damaged snaps, loss of absorbency, and skin irritation that continues despite appropriate cleaning and correct oil use.
Outer wrap care, from the product page: wipe minor oil promptly, wash in cool or warm water with mild detergent, protect the PUL, elastic, snaps and boning from high heat, air-dry it, never iron the PUL layer, and use no bleach or harsh solvents. Castor oil can permanently stain fabric, so the page recommends dedicated towels, clothing, bedding and storage containers. The liner page adds one more fact: darkening of the fleece is more likely caused by castor-oil oxidation, repeated warming, fabric staining, residue buildup, laundering and storage, and it does not show that anything left the body.
A second $35 liner lets one stay in use while the other is washed and dried.
Practitioner Eileen Durfee, NBS (Nutritional Balancing Science), NASM-CPT, is a wellness educator, inventor and author with 10 US and 6 international patents, 9 of the 10 US patents commercialized.
About 1 to 2 tablespoons on the fluffy center of a new liner, with about 1 inch of edge left dry. The fleece should be moist, not dripping.
About 20 to 30 minutes while awake, checking the skin.
The page asks first-time users to stay awake, and never to sleep with an electric heating pad turned on.
No. It is leak resistant; excess oil, wet edges, damage or a poor fit can let oil through.
The liner page lists castor-oil oxidation, warming, staining, residue, laundering and storage as the likely causes.
Published November 11, 2026 • Updated November 11, 2026
By Eileen Durfee, NBS, NASM-CPT, inventor and wellness educator.
This article is for educational purposes only. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. Nuco Enterprise Solutions LLC.
