A variety of filling materials are used, and the type of fill is a big part of how pillows are categorized. You’ve heard of down pillows, for example, which means the pillow is full of down undercoating or feathers, and hearing the words “memory foam” usually invokes the sinking sensation that good memory foam can give. Here’s a quick explainer of the main types of pillow fill you’ll find and how they differ.
Down pillows: Down pillows, as I mentioned above, are filled with either down clusters (an undercoating on ducks) or down feathers, or a mix of both. It’s a fill that’s been around for ages, and it feels similar to a comforter in the sense that it’s soft and squishy, and very malleable to shape in any way you prefer. (But it also doesn’t retain its shape well.) Since these are filled with down clusters or feathers, you’ll want to check for certifications, like the Responsible Down Standard (RDS), that confirm if the down was ethically sourced.
Down alternative pillows: These pillows aren’t a set type, but use other materials to replicate the down pillow experience. Buffy, for example, uses recycled plastic to create their pillow fill, while Saatva uses a combination of memory foam and latex foam. You’ll have to take a look to see what makes up any down alternative pillow, since it isn’t consistent. But what is consistent is the different feel. In my tests, I’ve found down alternative pillows are usually more supportive and do a better job holding their shape than a classic down pillow.
Memory foam pillows: Memory foam is popular since it can “remember” its original shape, letting it return to its previous form once your head is off the pillow. Memory foam does have a sinking sensation to it, which you might like or dislike. You’ll also want to check if the memory foam is a solid sheet or shredded; I’ve found shredded and cut memory foam to have more bounce and support and less sinkage than a memory foam sheet.
Latex foam pillows: Latex foam is made from rubber, giving it a much bouncier, supportive feel than other foam options. Latex foam is becoming a popular option thanks to that nice support, and it is usually found with a shredded type of fill that gives plenty of airflow.
Hybrid pillows: Hybrid pillows are another category gaining in popularity. It can be a mix of any of the above fills, but I often find it’s a sheet of foam combined with either shredded foam or some other kind of softer filling. Casper, for example, uses both sheets of memory foam and then has a core of shredded foam at the center of its Hybrid Pillow to give it its marshmallow-like feel.
Cotton, kapok, and wool: These pillow fills are all natural fibers that take less processing than foam, and could be used in a blend with other materials above. Kapok and cotton are supposed to be on the fluffy end, while wool is great for temperature regulation. But none are as popular as foam or down options, though you might see these as ingredients in organic or hybrid pillows.
Source: Wired
