This kit is 4ft x 16ft 1/4 solid closed cell foam core reflective insulation Our leading Competitor sells the same product for twice as much (type car insulation this is the same product without the fancy listing and advertising.) Our material comes from the same manufacturer and is Made in the USA Supershield Car Insulation is the professionals choice for Heat and Sound Automotive Insulation Car Insulation 64 Sqft - Thermal Sound Deadener - Block Automotive Heat & Sound Made in USA/Closed Cell Foam Core / #1 Selling Brand