COOLBOYS 20' x 20' Butter Cream Rectangle Sun Shade Sail

The COOLBOYS sun shade sail is listed as a 20' x 20' butter cream rectangle for outdoor shade. The listing claims UV resistance and up to 95% UV blocking, but also says the permeable fabric is not waterproof, so it is intended for sun shading rather than dependable rain cover.

At a glance

The listed 20' x 20' rectangle is intended to shade broad outdoor areas such as patios, decks, gardens and backyards.
Listing claims describe a breathable HDPE sail that blocks up to 95% of UV rays and provides an 85%-90% shade rate.
The listing describes reinforced seams and stainless-steel corner D-rings. These construction details are manufacturer claims, not independent verification.

Price

$79.99Save 20%

Reference price: ~~$99.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Large rectangular dimensions suit buyers looking to shade a broad outdoor area.
Air-permeable material is presented as a way to create shade while allowing air to pass through.
Customer feedback describes installation and construction positively overall.

Cons

It is not waterproof, so it is not suitable when reliable rain coverage is needed.
Customer feedback on durability and stretchiness is mixed, including reports of tearing within months and concerns about stretching.

Technical specifications

7 specifications

Identity
Brand	COOLBOYS

Size and weight
Listed size	20'x20'
Weight listed	4.36 kg

Color and style
Color	Butter Cream
Style	Custom

Materials and protection
Water resistance listed	Not Water Resistant
Special feature listed	UV Resistant

What to know before buying

Listing details to confirm

Listing details conflict or are unconfirmed: mounting is variously listed as Tie and Post Mount, while the feature text describes corner D-rings. The material is called PES in one feature and HDPE elsewhere, and the title says UV Block while specifications say UV Resistant. Confirm the selected listing's exact material, mounting method and protection claims. Customer feedback also differs on water resistance and stretchiness, while the listing says the sail is not waterproof.

Who is it for?

A good fit for

Buyers seeking a large, light-colored shade sail for a patio, garden, deck or backyard.
Buyers who want a permeable shade cover and do not need waterproof rain protection.

Less suited to

Buyers needing a waterproof canopy or reliable shelter from rain.
Buyers who require clearly specified mounting hardware or a confirmed fabric composition before purchase.

COOLBOYS 20' x 20' Butter Cream Rectangle Sun Shade Sail · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 460 ratings

5 stars66%66%
4 stars15%15%
3 stars8%8%
2 stars4%4%
1 star7%7%

Customer feedback highlights easy installation, good sun protection and well-made construction, while reports about durability differ, including both weather resistance and tearing within months. Opinions also vary on value and water resistance, and some feedback raises concerns about stretchiness. For buyers choosing this permeable, non-waterproof sail, those mixed reports matter most if long-term outdoor exposure, consistent fit or rain cover is important.

Positive themes

Customers describe the sail as easy to install and report good sun protection.
Some customer feedback describes the construction as well made.

Negative themes

Some customers report tearing within months of use.
Some feedback is negative about stretchiness.

Mixed feedback

Durability, value for money and water resistance receive mixed customer feedback.

Frequently asked questions

Is this shade sail waterproof?

No. The listing specifies Not Water Resistant and says air can pass through the fabric, so it should not be relied on for rain protection.

What UV and shade performance does the listing claim?

The listing claims up to 95% UV blocking and an 85%-90% shade rate. These are listing claims, not independently verified measurements.

What mounting method and material does it use?

The listing is inconsistent: it names Tie and Post Mount, describes corner D-rings, and refers to both PES and HDPE. Confirm the exact configuration with the selected listing before buying.