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LOS SUEÑOS DE LOS QUE ESTÁ HECHA LA MATERIA - Edición e introducción de Stephen HawkingLos textos fundamentales de la fsica cuntica y cmo revolucionaron la ciencia Aunque muchos lo ignoren, una parte sustancial de los pilares que sustentan la civilizacin actual se nutre de la fsica cuntica, junto a la relatividad una de las dos grandes revoluciones cientficas que cambiaron nuestra comprensin del mundo durante la primera mitad del siglo XX. Es el cuntico un mundo regido por leyes que parecen violar las leyes del sentido comn, como expres
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.7 ★★★★★
Based on 1918 reviews
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Product Reviews
★★★★★ 5
Good Value Latex Pillow
Size: Standard (Pack of 1)
Most latex are horribly expensive and smell strongly. This pillow good for a side sleeper, little odor, med firm.
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Reviewed in the United States on August 29, 2024
★★★★★ 5
Great size for vintage pillowcases
Size: Standard (Pack of 1)
Gives good support. And very pleased w/ comfort. Slightly larger than old replacement, but not the over-sized "standard" of 25".
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Reviewed in the United States on May 13, 2022
★★★★★ 5
Cool-temperature outer cover
Set name: UltraCool Pillow 2-Pack, King - Soft/Medium, Item length width: 40.0 Inches
The pillows (set of2) are easily fluffed and adjusted to personal desire. The outer cover is cool to the touch. I do not feel "cooler" with the pillow, but it does not get hot like some. I'm a side sleeper and sleep comfortably with the Slumber Cloud. I would buy these again.
Con: pillow cover is slick, so pillow cases slide off.
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Reviewed in the United States on January 10, 2026
★★★★★ 1
not cooling for post menopause
Set name: UltraCool Pillow, Standard - Medium/Firm Firmness, Item length width: 30.0 Inches
As a post menopausal person I did not find this cooling at all. The material is memory foam which holds heat but more importantly my head sinks in so that half of it is always surrounded by the pillow, trapping heat. It IS a supportive, soft and comfy pillow. For cooling though, I found it better to buy a firmer, thinner pillow which keeps my head from sinking into it, allowing heat to dissipate.
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Reviewed in the United States on August 25, 2025
★★★★★ 4
Nice and squishy
Set name: UltraCool Pillow, Standard - Soft/Medium Firmness, Item length width: 30.0 Inches
Not really a "cooling" pillow, but better than a standard or or fiber filled pillow. All these types of pillows and other bed linens are initially cool to the touch, but they quickly heat up to match your body temperature. Although the technology currently does not exist to maintain constant cooling, pillows like this are a good compromise for now. It's nice and soft and is a good value for the price.
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Reviewed in the United States on July 30, 2025
