Fifty grams is a concrete reason to look at a travel pillow. The Sea to Summit Aeros Ultralight Travel Pillow lists that weight, or 1.8 ounces, so you can decide whether a dedicated headrest earns its place alongside the rest of a light load.

I'd make that comparison against the pillow substitute you actually use now. A spare jacket might work, but not if wearing it leaves you with nothing comfortable under your head.

The Documented Details

50 grams / 1.8 ounces listed weight.
Recycled polyester and TPU film in the construction description.
Ultralight travel-pillow format.

Packed dimensions and inflated shape still need checking. A low weight is helpful, but it doesn't establish whether the pillow is tall enough, wide enough, or comfortable for your sleeping position.

Let the Sleep Position Decide

Try the pillow on the pad or bed you'll use, with your normal position in mind. Someone sleeping on their side may want a different height from someone resting on their back. Air adjustment, if provided by the exact design, is worth learning rather than simply inflating as much as possible.

Think about keeping the pillow in place too. A small pillow that moves away whenever you turn can be more annoying than a slightly larger option that suits the bedding better.

My Take

The Aeros Ultralight belongs on a shortlist when a separate pillow is desirable but every item has to justify its carried weight. I'd accept a simpler contact surface if the support feels right and the packed size fits.

If softness is the main priority, compare more cushioned alternatives directly. Its clearest appeal is giving you a dedicated pillow at a stated low weight, not promising the feel of a full-size bedroom pillow in every setting.