Synthetic pillows are much more popular than feather ones. However, this study investigated the levels of pet allergens in feather and synthetic pillows and found that sythetic pillows may not be the best choice for those with allergies. To summarize:
The use of non-feather pillows has increased over the last few decades.
Researchers have previously found significantly higher levels of dust mite allergens in synthetic pillows than in feather ones.
Dust samples were collected from 14 pairs of pillows (consisting of one synthetic fibre-filled and one feather-filled). Each pair of pillows had been on the same bed for at least 2 years.
Samples were extracted, and cat and dog allergens were determined using monoclonal antibody-based enzyme-linked immunosorbent assay (ELISA).
Total levels of pet allergens were significantly higher in the synthetic pillows (cat - 6.7-fold difference; dog - 8-fold difference)
Researchers state that the tightly woven encasements surrounding feather pillows act as a barrier for allergens.
Pediatric Allergy and Immunology July, 2000: 11; 71-73.