Why Use Wool for Diaper Covers?
Wool Science for Cloth Diapering Parents
Marc Pehkonen
January 25, 2001
Wool keeps sheep dry. Why? Wool's structure produces an elegant combination of
- water repellence,
- breathability and
- moisture absorbency.
At a microscopic level wool consists of a series of overlapping scales (called cuticles) which have a tendency to repel water droplets. This structure, in combination with a thin coating of lanolin (an oil secreted from the sheep's skin) causes water to run off the fibers. (The duck's back effect is also a sheep's back effect.) Natural water repulsion makes wool a good candidate for a diaper cover.
At right: SEM image: 100% wool at 250x magnification
But there's more. Many artificial fibers also repel water, but that alone does not make them a good choice for a diaper cover--a plastic bag would fill this condition. It is important that the fabric also be able to breathe, or the temperature next to baby's skin will rise. Breathability (and hence reduced skin temperature) is an important factor in preventing diaper rash. When a woven wool fabric is boiled, the fibers become entangled and they form a lofty mesh with many tiny air pockets. This process is called fulling. Fulled wool is a highly water-resistant, breathable fabric.
There's (yet) more. There are artificial fibers that both repel water and breathe--Goretex is one such fabric. The third important property of wool is that it also has the ability to absorb moisture at a microscopic level. Beneath the water-repellant outer cuticle of the wool fiber is a highly porous core. The voids in this core can store minuscule water droplets--up to 30% by weight of the fiber itself--so that wool is able to both absorb and transmit moisture simultaneously. This is a very elegant, balanced mechanism, and there is no artificial fiber that can do this.
This threefold combination of water-repellence, breathability and moisture absorbency make wool unparalleled as a choice for diaper covers.
It is also worth noting that even if an artificial fiber could be manufactured that exactly duplicated the properties of wool, the artificial fiber would still be a less desirable choice. Without exception, attempts to mimic nature are highly energy and resource-intensive, even if they achieve their goal.
Simple wool keeps sheep dry. It will keep your baby dry too.
Use Wool Diaper Covers
Would you like to try wool diaper covers on your baby? Wool soakers (pull-on covers) are easy to make. Crochet or knit your own wool soakers using the free Frugal Baby pattern. Sew your own wool diaper cover using any diaper cover sewing pattern.
If you are looking for ready made wool covers, many family-owned businesses make them. Fuzbaby’s wool cloth diaper covers are the Fuzbomb, with leg gussets and a back gusset that creates a tailored fit over bulky cloth diapers, and the Almost-in-One, with leg gussets and back snaps to attach a contour diaper.
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Text and images copyright © 2001 - 2007 Marc Pehkonen. All rights reserved.
