With these pillows' main materials being mineral oil and dry polymer,
the resultant material is however relatively expensive when compared
to produce compared to foam.

Gel has a very high tensile strength and is extremely durable. It is
guaranteed to not compress or permanently deform for 5 years. A natural
vibration and shock dampener, this material helps to significantly
eliminate travel fatigue.

Features:
1) 1cm embedded layer of soothing gel over a contour shaped memory
foam pillow
2) The air chamber constructed surface provides great air ventilation
between the user's head and pillow for super cool sleeping
3) Gel material side: consisting of numerous air chambers, this material
elevates the user's head and provides a great airy feeling in summer
4) Providing pleasant dry and airy sleeping conditions, these pillows are
absolutely great for use in summer
5) Gel layer gently cradles the user's head, neck and shoulders for a
restful, floating sensation
6) High-density, contoured memory foam supports head, neck and shoulders
to allow muscles to relax (rather than tense up as with regular
pillows), and helps keep the neck and spine properly aligned for a
restful sleep