Halero underfelt carpet 78"x90" Black — heavy-duty non-woven polyester for speaker boxes, trunks and marine use

Halero 78"×90" black underfelt is a heavy-duty, unbacked polyester carpet panel designed to line speaker boxes, trunks, RVs, boats and other automotive or marine interiors.

This large-format carpet sheet delivers 48.59 square feet of dense, non-woven polyester felt that resists oil, gas and salt while remaining flexible for trimming and installation. It ships folded for compact delivery and can be smoothed flat or lightly steamed to remove creases. Built for rugged use, the fabric offers good colorfastness and UV protection so it keeps a clean, low-profile look in cargo areas, speaker enclosures and upholstery projects.

How will this carpet improve my speaker boxes or sub enclosures?

Using Halero underfelt on speaker cabinets produces a tight, professional finish that reduces rattles and protects the wood or MDF surface. The dense polyester nap helps dampen minor vibrations and hides seams for a cleaner appearance while staying easy to cut around ports and drivers.

• Thick, non-woven polyester absorbs some vibration and hides construction flaws.
• Easy to trim to driver cutouts, ports and mounting flanges with a utility knife.
• Black finish minimizes light reflections and blends with most interiors.

Can I use this underfelt for car trunks, RV floors, or boats?

Yes—the fabric is suitable for cargo areas, trunk liners, RV compartments and marine cabins where a durable, flexible covering is needed. The material tolerates exposure to common automotive fluids and is solution-dyed for better resistance to fading and staining.

• High resistance to gas, oil and salt makes it practical for automotive and marine use.
• Flexible and easy to cut for lining irregular shapes and compartments.
• Solution-dyed polypropylene blend improves UV and color fastness.

How do I handle, cut and install the Halero carpet sheet?

Work on a flat surface and measure twice before cutting—this felt trims cleanly with a sharp utility blade, scissors or rotary cutter. Because the panel ships folded, lay it flat for several hours or apply light steam/iron heat (protective cloth recommended) to remove creases before adhering or stapling.

• Lay flat for a few hours or steam lightly to relax folds from shipping.
• Trim with a sharp blade for neat edges; use contact adhesive, spray glue or staples to secure.
• Test-fit on speaker flanges and trunk contours before final bonding or stapling.

What are the product specs and maintenance tips I should know?

The sheet measures 78 inches wide by 90 inches long, covering 48.59 square feet, and is made from 100% polyester fiber non-woven material. Maintenance is minimal: vacuum lightly, spot-clean with mild detergent, and avoid harsh solvents to preserve color and texture.

• Dimensions: 78" × 90" (48.59 sq ft); material: 100% polyester non-woven.
• Care: vacuum, gentle spot-cleaning; avoid aggressive chemicals.
• Warranty: 12-month quality coverage from Halero; contact support for issues.

Who this is for: installers, DIY audio builders and vehicle owners who need a large, black, resilient felt for lining speaker boxes, trunks, cargo areas, RV interiors and boats. If you want an affordable, easy-to-trim carpet panel that resists common automotive contaminants and provides a neat, low-profile finish, this Halero underfelt suits both hobbyists and professional fitters.