ShadeMart 18ft x 23ft White Sun Shade Sail UPF50 Rectangle

In this review of the ShadeMart 18ft x 23ft White Sun Shade Sail, the bottom line is simple: this is a durable, breathable shade solution for patios, carports, and yards where UV protection and airflow matter most. The reviewer found the woven HDPE fabric and stainless steel corner D rings make the sail feel built for outdoor use, and the UPF50 rating delivers effective sun blocking while still allowing water and air to pass through. If you need a large, decorative rectangle sail that lowers temperature and installs to existing posts or structures, this will interest you.

Key Features

• Woven HDPE fabric: Provides a durable, UV-resistant screen that blocks up to 95% of harmful rays while remaining breathable so heat does not build up under the sail.
• Stainless steel D rings and heavy webbing: Reinforced attachment points make the sail easier to tension and more resistant to wear where hardware connects.
• Water permeable construction: Allows rain and airflow to pass through, preventing pooling and promoting comfort during warm or wet weather.
• Large rectangle size: The 18ft x 23ft footprint covers wide patios or carports and is useful for shading seating areas, pools or play spaces.
• Custom size options: Available in custom sizes so users can match unusual layouts, provided they measure the venue carefully before ordering.

Who It's For

This shade sail works well for homeowners or renters who want an effective, low-profile canopy for a patio, pergola, carport or poolside area. It is a good pick where airflow and UV protection matter more than full waterproofing, and for people who plan to anchor the sail to posts, walls, trees or roofs with a hardware kit.

Those who need a fully waterproof canopy or a rigid structure for frequent heavy rain should look elsewhere, since the fabric is deliberately water permeable. Also, buyers who cannot measure their installation area accurately or expect factory-perfect sizing should factor in possible variation from manual measurements.

Pros & Cons

Pros

• Effective sun protection that blocks up to 95% of UV rays while lowering temperatures underneath.
• Durable construction: woven HDPE fabric with stainless steel D rings and heavy webbing for secure anchoring.
• Breathable and water permeable design prevents water pooling and improves comfort on hot days.
• Custom sizing available to fit nonstandard areas.

Cons

• Not waterproof, so it will not keep an area dry during heavy rain.
• Size variations can occur due to manual measurements, so precise measuring is required before purchase.

Specifications

Shape	Rectangle
Material	Woven HDPE (High Density Polyethylene)
Size	18ft x 23ft
UV Protection	UPF50, blocks up to 95% of UV rays
Attachment	Stainless steel corner D rings on heavy white webbing
Water Resistance	Water permeable / not waterproof
Custom Options	Custom sizes available

Our Verdict

The ShadeMart 18ft x 23ft rectangle sail is a practical, value-oriented choice for anyone seeking strong UV protection and airflow over a large outdoor area. It is well suited for patios, carports and poolside shading when waterproofing is not required, and the reinforced corners and heavy fabric make it a durable long-term option if installed correctly.

Frequently Asked Questions

Is this shade sail waterproof?
The sail is water permeable and breathable, so it will not keep an area dry in heavy rain.

What hardware is needed to install it?
Use a proper hardware kit with turnbuckles, padeyes or strong anchors suitable for posts, walls or trees; reinforced D rings make attachment easier.

Can I get a different size?
Yes, custom sizes are offered but measure your venue carefully because manual measurements can cause small variations.