100% Blackout 340 GSM Curtains 2 Panels - Full Shade, Thermal

In this review the Rutterllow 100% Blackout 340 GSM curtains are judged on light blocking, build quality and thermal performance; they are best for sleepers, media rooms or anyone needing complete darkness during the day. The package includes two heavy panels that together provide a full 104in width and each panel measures 52in by 102in, and the standout reason to buy is the advertised 100% blackout performance combined with dense 340 GSM fabric that also improves heat retention.

Key Features

• Complete blackout: The fabric and construction are designed to block sunlight fully, creating a true dark environment for daytime sleep or light-sensitive activities.
• Generous sizing: Each panel is 52in wide by 102in long, and the pair covers 104in of window width, which suits large windows or sliding doors.
• Heavyweight fabric: The 340 GSM material feels substantial and contributes to both sound dampening and thermal insulation.
• Grommet top design: Eight copper grommets per panel with a 1.6in inner diameter slide easily on standard curtain rods and add a traditional look.
• Easy care: Panels can be machine washed in cold water and tumble dried low, making maintenance straightforward despite the thick fabric.
• Privacy and energy savings: Blocking light also helps protect privacy and can reduce heating and cooling load in the room.

Who It's For

These curtains are aimed at people who need a real dark room: shift workers who sleep during the day, home theater owners, content creators using LED or strobe lighting, and anyone who prefers strong thermal insulation from window treatments. The heavy 340 GSM weave and full blackout claim make them a good fit where light and heat control are priorities.

Those who want a very precise color match or a lightweight, sheer aesthetic should look elsewhere; several buyers noted mixed impressions of the dark gray shade, so if exact tone is critical, request a swatch or compare in person first.

Pros & Cons

Pros

• Effectively blocks light and helps create a dark sleep environment.
• Thick, well-made material that feels durable and provides heat retention.
• Full set of two panels offers wide coverage for larger windows or doors.
• Simple machine-wash care keeps maintenance easy despite the heavy fabric.

Cons

• Color may vary from expectation; some customers reported the dark gray leaning darker than expected.
• Weight and thickness make them less suitable for those wanting a lightweight or airy curtain.

Specifications

Package	2 panels
Panel size	52in x 102in each
Total coverage	104in x 102in
Fabric weight	340 GSM
Top style	Grommet with 8 copper grommets, 1.6in inner diameter
Care	Machine wash cold, tumble dry low, warm iron as needed

Our Verdict

The Rutterllow 100% Blackout 340 GSM curtains are a solid choice for anyone who needs dependable darkness and improved thermal performance at a reasonable price; their heavy fabric, true blackout capability and easy-care instructions make them good value for bedrooms and media rooms, while buyers prioritizing a specific shade of gray should verify color before purchase.

Frequently Asked Questions

Do these curtains really block all light?
Yes, the construction and dense 340 GSM fabric are intended to provide full blackout performance when installed to cover the window.

Will they fit standard curtain rods?
Yes, each panel has eight grommets with a 1.6in inner diameter that fit most standard rods.

How should I wash them?
Machine wash cold, tumble dry low and warm iron as needed; do not bleach.