Optika B-50 Microscope 400x

Marsoni

M251S

$134.52

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

Optika B-50 Microscope 400xHead: Monocular, 45 inclined, 360 rotating. Eyepieces: WF 10x 18, WF10X 18mm large field with 18 field. Nosepiece: Triple. Objectives: Achromatic 4x, 10x, 40x (tube length 160mm and cover 0. 17mm). Achromatic 4x 0. 10 Achromatic 10x 0. 25 Achromatic 40x 0. 65 Stage: Fixed, 120110 mm, with sample clips. Focusing: Coaxial coarse and fine, macro and micrometric by coaxial control. Condenser: N. A. 0. 65, fixed, with iris diaphragm and built in

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I got this pillowcase for my husband because he is always hot at night and has trouble falling asleep because of it. The fabric of this pillowcase feels very similar to a cooling pillowcase that I have had for years and love (but is discontinued, so I can't get any more of them). It is a silky smooth, not-quite-satin fabric that feels initially very cool to the touch. It fits on a standard size pillowcase, and has a slight pocket end (not very much overlap, so it does come untucked during the night). My husband reports that this pillowcase is very cooling right when he goes to bed, but after a short while, it warms up and isn't really cool anymore. So if he doesn't fall asleep right away (and he usually doesn't), he has to flip it over. His head puts out a lot of heat at night though, so the pillowcase might stay cooler longer for others.

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Reviewed in the United States on September 13, 2025

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Amazon Customer

Chelsea, US

★★★★★ 3

Doesn’t stay on the pillow.

Color: Gray, Size: Queen (2 Count)

The concept is there, but the pillow case doesn’t stay on. Every night the pillow case slides either half way or completely off the pillow. If it stayed on I would love it

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Reviewed in the United States on March 3, 2026

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Julianne OConnell

Waukegan, US

★★★★★ 5

Cooling comfort

Color: Gray, Size: Queen (4 Count)

Very comfortable and cooling. Love them. Help me fall asleep faster and stay asleep instead of flipping my pillow all night.

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Reviewed in the United States on August 17, 2025

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