ShadeMart 7 ft x 21 ft Blue Rectangle Shade Sail - UPF50 Outdoor

In this review the ShadeMart 7 ft x 21 ft Blue Rectangle Shade Sail is examined for homeowners and small businesses that need a durable, breathable sun cover. The bottom line: this sail works best as a cooling, decorative canopy that blocks harmful rays while allowing water to pass through; its woven HDPE fabric and stainless steel corner D rings make it a practical choice for patios, carports, pergolas and pool areas where ventilation and UV protection matter most. Installation is straightforward with proper hardware and careful measurement.

Key Features

• Woven HDPE fabric: the high density polyethylene material provides a strong, tear-resistant surface that breathes and reduces heat under the sail.
• UPF50 sun protection: blocks up to 95% of UV rays, which lowers ambient temperatures and protects people and furnishings beneath the canopy.
• Water permeable: the breathable weave allows rain and air to pass through, preventing water pooling and reducing wind stress on the sail.
• Stainless steel D rings: heavy duty corner D rings attached to white webbing give secure anchor points for standard hardware kits and repeated installations.
• Custom sizing available: multiple sizes and colors are offered so the sail can be tailored to a particular venue when measured accurately.

Who It's For

This shade sail is ideal for homeowners with patios, pool decks, carports or yards who want an affordable way to cut sun and heat while keeping airflow. It suits DIY installers who will mount the sail to walls, poles or trees using separate hardware kits and who value a breathable, nonwaterproof fabric.

Those who need a fully waterproof canopy, precise factory-cut geometric perfection for strict architectural use, or an exact pre-installed mounting kit included should look elsewhere. Also measure carefully; customers report size variations and irregular shapes can appear with manual measurement.

Pros & Cons

Pros

• Very good sun protection and heat reduction thanks to UPF50-rated woven fabric.
• Durable materials including stainless steel D rings and reinforced white webbing at corners.
• Breathable, water permeable design prevents pooling and handles wind better than solid waterproof covers.
• Available in multiple colors and custom sizes to fit different outdoor layouts.

Cons

• Not waterproof, so it will not keep rain out in a downpour.
• Some customers report size or shape inconsistencies from manual measurements, so careful measuring is required before ordering.

Specifications

Product shape	Rectangle
Size	7 ft x 21 ft
Material	Woven HDPE (High Density Polyethylene)
UV protection	Blocks up to 95% of UV rays (UPF50)
Water performance	Water permeable / breathable (not waterproof)
Corner fittings	Stainless steel D rings with heavy duty white webbing
Customization	Custom size options available; measure venue accurately

Our Verdict

The ShadeMart 7 ft x 21 ft Blue Rectangle Shade Sail is a sensible buy for people who need dependable UV protection and airflow for patios, pools and carports; it balances durability and breathability at a fair value. If you want a breathable, decorative canopy that lowers temperature and stands up to use (with proper mounting), this sail is a cost-effective solution - just allow for manual measurement tolerance and plan for separate hardware if you need full waterproofing.

Frequently Asked Questions

Is this shade sail waterproof?
No. The fabric is water permeable and breathable so it allows water to pass through and will not keep heavy rain out.

Can the sail be attached to poles, walls or trees?
Yes. With the proper hardware kits it can be mounted to poles, trees, walls or roofs using the stainless steel D rings and webbing.

Do sizes vary from the listed dimensions?
Yes. Shade sails may vary due to manual measurements, so measure the venue carefully and expect slight variances in shape while the fabric area remains constant.