Air and dust insulator, anti-insect door blockerAirtight windproof seal retains heat and repels moistureGlides over wood, tile and even carpetCut the two channels to fit any length of door or windowMade of water-resistant micro fleeceKeep out noise, insects and toxic fumesWide Use - Except for front door, back door, garage entry door, bedroom door, bathroom door, it is also suitable forEasy and convenient door draft stopper that moves easily with the door and glides over carpet, wood, tile and linoleum. No need to bend down and reposition.There is 2-3% difference according to manual measurement.