Our magnetic fireplace vent cover is designed to seal the fireplace vent to block cold air in winter and to prevent dust and pollen from entering the room through the vent. Key benefits Blocks cold drafts and reduces heat loss to help keep your indoor space warm and comfortable all winter. Helps prevent dust and pollen from entering the room through the vent, supporting a cleaner indoor environment. Easy to install with a magnetic attachment, providing a secure fit without tools. Material and construction Made from thickened polyester for durability and resistance. Flame retardant properties add safety alongside effective insulation. Magnetic design allows quick, tool installation and removal. Performance and compatibility Designed for use with magnetic fireplace vents, delivering a simple, reliable draftstopping solution. Focused on improving insulation and energy efficiency by reducing heat loss through the vent. Use scenarios Living room or family room in winter to prevent heat loss from an unused or inactive fireplace. Homes with allergy or pollen concerns to minimize airborne contaminants entering through the vent. Seasonal use or during fireplace maintenance when you want a quick, temporary seal without permanent mounting. Why this stands out Durable thickened polyester with flame retardant properties for safer, longlasting performance. Easy, magnetic installation that does not require tools or permanent modifications. Clear functionality: reduce drafts, improve warmth, and support energy efficiency through a simple vent seal.