King Size Cooling Pillows Set of 2 review: what to know before you buy

Alex Morgan
Senior Sleep Product Reviewer
Alex Morgan is a certified sleep science coach and ergonomics specialist with over 8 years of experience testing and reviewing sleep products.
86
Very good
★★★★☆(86/100)
345 customer reviews
Brand: Threadmill
Best For: Side sleepers wanting a plush, cooling pillow with versatile support.
Rating: 4.3/5
$35.90 at Amazon
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Price checked February 18, 2026

Pros & Cons

Pros

  • Plush comfort ideal for pillows for side sleepers
  • Cooling technology aids temperature regulation, a plus for best cooling pillow for side sleepers
  • Machine washable for easy maintenance
  • No-shift design reduces need for constant fluffing
  • Good value with two king-size pillows in a pack

Cons

  • May be too plush for those preferring a firm pillow for side sleepers
  • Cooling effect might not suffice for very hot sleepers
  • Some users found it less soft than expected compared to best down pillow for side sleepers

Our Verdict

Based on product data and customer reviews, the Threadmill pillows are a strong option for side sleepers, offering plush comfort and cooling features that many users praise. However, they may not be the best pillow for side sleepers with back pain requiring firm support, as they lean soft. Review excerpts highlight side sleepers finding them comfortable and supportive, with improved sleep quality.

Threadmill Down Alternative Pillows: Best Pillow for Side Sleepers? – See it in use
See it in use

Who Should Buy This?

These pillows are best for side sleepers who enjoy a soft, cushioned feel and may also work for back sleepers, making them a candidate for best pillow for side and back sleepers. The cooling feature benefits those who sleep hot, and the plush support suits users without severe neck issues.

Buy It If:

  • Side sleepers seeking a plush pillow with cooling tech
  • Hot sleepers looking for breathable bedding
  • Value-conscious buyers wanting two quality pillows

Skip It If:

  • Stomach sleepers needing low loft
  • Individuals requiring firm orthopedic support for pain
  • Those preferring natural down over synthetic fills

Performance & Features

Performance analysis, derived from customer reviews, shows these pillows excel in comfort and support for side sleeping positions.

Threadmill Down Alternative Pillows: Best Pillow for Side Sleepers? – Close-up on materials
Close-up on materials

What Works Well

Users report the pillows mold well to the head and neck, providing consistent support for side sleepers. The cooling technology is effective for many, positioning it as a best cooling pillow for side sleepers, and the no-shift design minimizes nighttime adjustments.

What Could Be Better

Some reviewers note the cooling may not be enough for extreme hot sleepers, and a few find the plushness lacking compared to firmer options, suggesting it might not be the best pillow for side sleepers with arm under pillow who need extra height.

Build Quality & Design

The down alternative fill offers a hypoallergenic, plush feel, while the 300-thread count cotton cover enhances breathability and softness, contributing to the cooling effect emphasized in features.

With a king size and plush firmness, these pillows provide adequate loft for side sleepers to maintain alignment. They are versatile for side and back sleepers but may be too high for stomach sleepers.

Machine washable and tumble dry friendly, these pillows are easy to clean. User reviews indicate they hold shape well over time, supporting the no-shift design claim.

Value for Money

Priced at $56.99 for two king-size pillows, the Threadmill set offers solid value, especially when compared to single premium pillows, with added benefits like cooling and washability.

Specifications

Specifications

Brand
Threadmill
ASIN
B0C593CHV8
Size
Queen (Pack of 2)
Fill material
Memory Foam
Cover material
Polyester
Dimensions
30"L x 20"W
Weight
5 pounds

Top Alternatives

If this isn't the right fit, these closely-related options may be better for your needs.

Comodo Body Pillow for Side Sleepers

Comodo Body Pillow for Side Sleepers

Side sleepers needing full-body support

Utopia Bedding Pillows for Side Sleepers

Utopia Bedding Pillows for Side Sleepers

Side, back, and stomach sleepers seeking a cooling, hotel-quality pillow.

Smilereve Adjustable Cooling Memory Foam Pillows

Smilereve Adjustable Cooling Memory Foam Pillows

Side sleepers seeking adjustable firmness and cooling comfort.

How We Tested

This review is based on aggregated product specifications and verified customer feedback; we did not conduct hands-on testing.

Testing Criteria

We assessed comfort for side sleeping, cooling performance, support level, ease of care, and overall value using user data.

Data Sources

Data sourced from Amazon product listings, including feature bullets, specifications, and customer review excerpts.

Note: Personal sleep preferences vary; what works for one side sleeper may not for another, so consider individual needs like firmness or cooling requirements.

Frequently Asked Questions

Is this the best pillow for side sleepers with neck pain?
While supportive for many, the plush firmness may not suffice for severe pain; consider firmer orthopedic memory foam pillows for best pillow for side sleepers with neck and shoulder pain.
How does it compare to memory foam side sleeper pillows?
It offers a softer, traditional feel compared to firmer memory foam options, making it better for those who prefer plushness over contouring.
Are these good for side and stomach sleepers?
Primarily suited for side and back sleepers; stomach sleepers might find the loft too high, so it's not the best pillow for side and stomach sleepers.
Affiliate Disclosure: We may earn a commission if you buy through links on this page. This helps support our work. Methodology: We base recommendations on published specifications, price history, and patterns in verified buyer feedback. If hands-on testing isn't available, we disclose limitations. Updated: December 02, 2025