Dometic 25' Insulated Flex R4.2 Ducting/Duct - 3

Dometic 25' Insulated Flex R4.2 Ducting/Duct - 3" - 9108549909

Marsoni

M251S

$103.50

Get it in 3 business days with 1 day shipping. Friday, May 29

Dometic 25' Insulated Flex R4.2 Ducting/Duct - 3" - 910854990925' Insulated Flex R4. 2 Ducting Duct 3" Round wire and mylar fabric shell ducting with 1" wall thickness of insulation. Legacy # 226600077 Features: R4. 2 Insulated Flexible Ducting 25' Length Insulation thickness 1" Internal diameter 3" *Sold as an Individual WARNING: This product can expose you to chemicals including ARSENIC which is known to the State of California to cause cancer or other reproductive harm. For more information go to P65Warnings.

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I have them in every color and used to get them from Sams, but they stopped selling them and I was lucky to find them on Amazon. Got all colors again. They stay, it's all I'm gonna say! And don't show in any of my tennis shoes. Absolutely love them and wear them until they get holes. They last a LONG time too. They're on the thin side and my foot loves them because they tend to get hot. There's no shrinking, they wash great with exception of the white ones I couldn't manage to keep white - they turned a bit greyish.

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Reviewed in the United States on January 4, 2026