Pillow fill types compared

Short answer. The sources we read do not name a winning fill. They show that mite allergen builds up on pillows of any fill that sits in a mite-rich bed, that a few fills have specific, different concerns, and that for several fills (memory foam, latex, wool pillows) there is no readable pillow-level data. Where a comparison point has no source, this page says so rather than guessing. Nothing here is medical advice; allergy questions belong with a clinician or allergist.

What the evidence covers

Dust mites are the usual reason people compare pillow fills. NIEHS says mites live in mattresses and bedding, feed on shed skin, and “cannot be completely eliminated” however clean the home is; it advises humidity at or below 50 percent, allergen-impermeable covers on mattresses and pillows, and weekly hot washing of bedding. For the wider background see why dust mites live in bedding and how mite-proof cover pore size works.

Down and feather versus synthetic

A 1999 study (PMID 10051721) put pairs of new synthetic and feather pillows on 12 beds and measured the mite allergen Der p 1 for 12 months. After a year, synthetic pillows held 19.28 micrograms per gram of dust (95% confidence interval 9.76 to 38.07) and feather pillows 6.45 (2.96 to 14.05). The authors report that synthetic pillows accumulate Der p 1 faster, and that pillow levels followed the Der p 1 concentration of the mattress where they were placed (r = 0.72). They also refer to an earlier study from the same group with the same direction of result. This is a small study from 1999, and it does not test how washing or covers change the picture.

Down has a separate issue unrelated to mites. A 2019 cohort (PMID 31042573) found that 32 of 80 patients with hypersensitivity pneumonitis used goose or duck down bedding, and 12 of those 32 went into remission or stopped progressing after avoiding it. That is a lung condition rather than a typical pillow allergy, and the abstract does not say how common it is among ordinary down users. A 2019 laboratory paper (PMID 30901881) says down and feather materials can become more allergenic when contaminated with microorganisms, and that washing the material appropriately reduced bacteria counts. It tested raw materials, not finished pillows. For the comforter side of this choice see down versus down-alternative pillows.

Down-alternative (polyester) fills

The only direct data we read on synthetic pillows is the 1999 result above: more Der p 1 after a year than feather. A 2004 Korean study (PMID 15308838) found no Der f 1 on new synthetic pillows and a geometric mean of 1.08 micrograms per gram after three months. We found no source on washability of polyester fill beyond the general advice to wash bedding hot.

Memory foam and latex

We found no readable study of mite allergen on memory foam or latex pillows; the table below marks this as unknown. For latex, the AAAAI describes latex as sap from rubber trees and says natural rubber latex is often found in gloves, condoms, balloons, rubber bands, erasers and toys. It says the only way to prevent a reaction in a person with latex allergy is to avoid latex, and that diagnosis belongs with an allergist. Its page does not address pillows, mattresses or how much protein survives in a finished latex product, so we cannot say whether a given latex pillow matters for a latex-allergic person. See the latex versus memory foam pillow comparison and the mattress topper roundup for related products.

Wool

The Melbourne mite study (PMID 9058687) measured mite allergen on mattress coverings, not pillows. Surface Der p 1 was 116 micrograms per gram on sheepskin, 113 on wool, 19 on cotton and 0.4 on impermeable encasements. A New Zealand survey (PMID 9678840) found bedding levels higher in beds with wool underlays, kapok or inner-sprung mattresses. Both are about bedding layers other than pillow fill and do not show that a wool pillow behaves the same way. Wool allergy and skin reactions are covered in whether wool is hypoallergenic.

Buckwheat

On the 2004 Korean study (PMID 15308838), new buckwheat pillows carried much more endotoxin than new synthetic ones (60,950 versus 4,887 EU/g, p<0.001), while mite allergen was absent when new and similar after three months (1.16 versus 1.08 micrograms per gram). The authors tie endotoxin to asthma severity in atopic asthmatics. That is the full extent of what we read on buckwheat.

Comparison at a glance

Fill	Mite allergen data read	Other point from sources read	Washability source
Down and feather	Feather: lower Der p 1 than synthetic at 12 months (one small 1999 study)	Hypersensitivity pneumonitis case series; microbial contamination paper	None found
Down-alternative polyester	Higher Der p 1 than feather at 12 months; 1.08 micrograms per gram at 3 months (different study)	None found beyond the above	None found
Memory foam	None found	None found	None found
Latex	None found	AAAAI latex allergy overview; nothing pillow-specific	None found
Wool	Mattress coverings only, not pillows	Higher bedding levels with wool underlays (NZ survey)	None found
Buckwheat	No allergen when new; similar to synthetic at 3 months	Higher endotoxin when new	None found

Products on this site, by fill

We have not tested products. These are the pillow records on this site, with the evidence level stated on each; they cover only polyester down-alternative and a foam-and-microfiber blend, and none is shown by the sources above to be better for allergy.

• Boll & Branch Down Alternative Pillow: PrimaLoft down-alternative fiber fill with an organic cotton shell. Per the maker’s page, read 13 November 2026, the maker calls it “A hypoallergenic PrimaLoft® pillow with a 100% organic cotton shell” (the maker’s claim, not a defined standard) and cites OEKO-TEX STANDARD 100 and OCS statements.
• Brooklinen Down Alternative Pillow: recycled polyester microgel fill with a cotton sateen shell. Captured from the maker’s page in a browser on 13 November 2026; the maker calls the fill “hypoallergenic” (maker’s claim). No Amazon listing found; the card links to the maker’s site.
• Coop Home Goods Original Adjustable Pillow: cross-cut memory foam and microfiber blend. Captured from the maker’s page in a browser on 13 November 2026; the maker calls the blend “hypoallergenic” (maker’s claim) and cites GREENGUARD GOLD and CertiPUR-US, not OEKO-TEX.
• Buffy Cloud Pillow: recycled PET fill with a TENCEL lyocell shell. Meets our criteria; the maker doesn’t call it hypoallergenic. Captured in a browser on 13 November 2026; it cites OEKO-TEX STANDARD 100 Class I.
• Parachute Down Alternative Pillow: recycled polyester fill with a cotton sateen shell. Meets our criteria; the maker doesn’t call it hypoallergenic. Captured in a browser on 13 November 2026; it cites an OEKO-TEX STANDARD 100 certificate number.

The full list, with the Utopia pillows, is in hypoallergenic pillows.

Applying this

Choose a fill for comfort and for the specific concern you have (latex allergy, down sensitivity), then handle mites with the measures the health bodies describe: an allergen-impermeable pillow protector, weekly hot washing of sheets and bedding, and humidity control. Our bedding overview and bedroom guide put these together. For what certification labels do and do not show, see OEKO-TEX Standard 100 explained and allergy-certified bedding labels. The wording on makers’ pages is covered in what hypoallergenic means.