WD Digital WD Purple 4TB 3.5' Surveillance HDD 5400RPM 64MB SATA3 6Gb/s 150MB/s 180TBW 24x7 64 Cameras AV NVR DVR 1.5mil MTBF 3yrs

WD Digital WD Purple 4TB 3.5' Surveillance HDD 5400RPM 64MB SATA3 6Gb/s 150MB/s 180TBW 24x7 64 Cameras AV NVR DVR 1.5mil MTBF 3yrs

Marsoni

M251S

$112.50

Get it in 3 business days with 1 day shipping. Friday, May 29

WD Digital WD Purple 4TB 3.5' Surveillance HDD 5400RPM 64MB SATA3 6Gb/s 150MB/s 180TBW 24x7 64 Cameras AV NVR DVR 1.5mil MTBF 3yrsWestern Digital WD Purple 4TB 3. 5' Surveillance HDD 5400RPM 64MB SATA3 6Gb s 150MB s 180TBW 24x7 64 Cameras AV NVR DVR 1. 5mil MTBF 3yrs WD Purple Surveillance HDD Uncompromising Storage for 24 7, Always On Security Systems OVERVIEW Engineered for the Extreme Demands of 24 7 Surveillance Systems WD Purple surveillance storage features Western Digitals exclusive AllFrame technology, so you can confidently create a security system tailored to the needs

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the problem with these "cooling" pillows is any cooling effect is almost completely negated by a pillow case. this particular pillow is cool to the touch, but completely useless as it flattens out completely, way too soft I think for anyone. I would not recommend this "NASA" pillow for anyone for anything. Maybe for 10 bucks, but certainly not what they ask for this. I did keep it though. It is "cool" but only for a moment and your flipping it around like any other pillow. also way too soft. BUt, it has been cool enough to get me back to sleep.

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Reviewed in the United States on May 29, 2025

Verified Purchase

Jack D King

Dallas, US

★★★★★ 5

Fantastic pillows

Set name: UltraCool Pillow 2-Pack, King - Medium/Firm, Item length width: 40.0 Inches

I cannot say enough how happy I am with these pillows. Truly amazing. I put REST pillowcases on them and they are constantly cool/cold.

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Reviewed in the United States on August 11, 2025

Verified Purchase

Rachael C.

Boise, US

★★★★★ 5

Love it

Set name: UltraCool Pillow, King - Soft/Medium Firmness, Item length width: 40.0 Inches

I really like this pillow!! It’s a nice medium fluff. I do think it feels cooler. And, when you flip to the “cool side of the pillow” it’s realllly chilly. It’s very long - it sticks out of my king size pillowcase a little bit - but not enough to be bothered by it.

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Reviewed in the United States on September 13, 2023