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  • How are reviewers describing this item?
    good, great, fit, quality and size.
  • Our engine has profiled the reviewer patterns and has determined that there is minimal deception involved.
  • Our engine has detected that Amazon has altered, modified or removed reviews from this listing. We approximate total reviews altered up to 1.
  • Previous analysis of this listing was an C grade.
  • Our engine has discovered that over 90% high quality reviews are present.
  • This product had a total of 464 reviews as of our last analysis date on Nov 8 2019.


Most positive reviewquestion

Best price I’ve found for this brand.

Least positive reviewquestion

product priced reasonably---however one filer was received damaged!!!!

Most authentic reviewquestion

This was my second order for this product. I have been happy with all aspects, including price, delivery, and performance.

Least authentic reviewquestion

Not enough review data to provide meaningful insight.

Helpful Insights


    Posted by a reviewer on Amazon

    Pay attention to size details.

    Posted by a reviewer on Amazon

    Readings inconsistent but within tolerance.

    Posted by a reviewer on Amazon

    It works for me and i've got horrible allergies, so there's that.

    Posted by a reviewer on Amazon

    The dimensions aren’t exactly what they might seem at first.

    Posted by a reviewer on Amazon

    Air goes in, air comes out.

Review Count History
Price History