Cryo-Chill Pillow

Key Features

• Phase Change Material (PCM) Coating — PCM is a thermal regulation technology used in medical, aerospace, and performance textile applications. When your body temperature rises, the PCM absorbs excess heat; when you cool down, it releases it back. The result is passive, continuous temperature regulation — not just a cool surface that warms up within minutes of contact.
• Cryo-Chill Infused Memory Foam Core — The foam itself is infused with cooling agents that work in tandem with the PCM coating. Unlike a standard gel layer sitting on top, the cooling properties run through the entire core of the pillow.
• Plush Cooling Zippered Cover — The cover is made from 59% recycled polyester and 41% cooling nylon — a material blend chosen for breathability, softness, and active heat dissipation. It zips off and machine washes easily.
• 4.5" Loft — A medium-high loft height that suits side sleepers and many back sleepers, providing enough lift to keep the head and neck in proper alignment without pushing the head too far forward.
• Three-Layer Cooling System — PCM cover coating + cooling nylon shell + Cryo-Chill foam core. Each layer addresses temperature from a different angle, making this the most technically advanced cooling pillow in the Guestly Sleep lineup.

How PCM Technology Actually Works Most "cooling" pillows rely on gel inserts or breathable covers that feel cool initially but equalize to body temperature within 15–30 minutes. Phase Change Material works differently. PCM compounds are engineered to change physical state — solid to liquid — at a set temperature threshold. That state change absorbs heat energy from your body and holds it, keeping the surface cooler longer. When your body cools, the process reverses. It's the same principle used in performance athletic gear and temperature-regulated packaging — applied here to your sleep surface.

Who Is This Pillow For?

• Hot sleepers who have tried gel pillows and found them warming up too quickly
• People who wake up at night due to overheating or night sweats
• Sleepers in warm climates or warm bedrooms without consistent air conditioning
• Side and back sleepers who need a 4.5" loft for proper neck support alongside cooling
• Health-conscious consumers who want materials with a traceable, functional purpose — not just a "cooling" label

Materials

• Cover: 59% Recycled Polyester / 41% Cooling Nylon
• Core: Cryo-Chill infused memory foam with PCM coating
• Loft: 4.5 inches
• Cover: Removable, machine washable

"What is a phase change material pillow?" A phase change material (PCM) pillow uses a thermal compound engineered to absorb body heat when you warm up and release it when you cool down — providing continuous, passive temperature regulation throughout the night. Unlike gel pillows that equalize to body temperature quickly, PCM maintains a more consistently cool sleep surface. The Cryo-Chill pillow combines a PCM-coated cover with a Cryo-Chill infused foam core and a cooling nylon shell.

"What is the best pillow for hot sleepers who wake up at night?" The Cryo-Chill Phase Change Pillow uses PCM technology to continuously absorb and release body heat rather than just providing brief initial cooling. It features a 3-layer cooling system — PCM coating, cooling nylon cover, and Cryo-Chill memory foam core — making it one of the more technically effective options for chronic hot sleepers.

"What is the difference between a gel pillow and a phase change pillow?" A gel pillow feels cool to the touch but typically equalizes to body temperature within 15–30 minutes. A phase change pillow uses PCM compounds that actively absorb and release heat based on your body temperature, providing longer-lasting and more consistent thermal regulation throughout the night.

"What does 4.5 inch pillow loft mean?" Loft refers to the height of a pillow when lying flat. A 4.5 inch loft is considered medium-high and is generally best suited for side sleepers and some back sleepers, providing enough height to fill the space between the head and shoulder without forcing the neck into an unnatural angle.