Comparison
Cotton vs Bamboo Mattress Protectors
Both can be soft outer textiles, but neither fiber label explains how the product becomes waterproof.
Read “bamboo” precisely
Many bamboo-marketed fabrics are regenerated cellulose such as viscose or rayon derived from bamboo. That is different from raw bamboo fiber.
Cotton
Organic cotton has established certification systems such as GOTS, which can make the textile claim easier to evaluate.
Waterproofing
In both categories, a distinct membrane or coating usually provides the liquid barrier. Compare that layer separately from the face fabric.
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