--- description: Find out why 3M Post-it Flex Write Surface is one of the best inventions of 2020. title: 3M Post-it Flex Write Surface: The 100 Best Inventions of 2020 image: https://static.time.com/v3/assets/bltea6093859af6183b/blt53d0f2358eb89095/698a144586f68e3e176ef69d/best-inventions-of-2020-Post-it-Flex-Write-Surface-5.jpg?branch=production&width=3840&quality=75&auto=webp&crop=16:9 --- Nov 19, 2020 # The Roll-Your-Own Whiteboard 3M Post-it Flex Write Surface by [TIME Staff](/author/time-staff/) ## TIME Staff Update your preferences in [Account Settings](/account/preferences/) Close  Courtesy It’s about time someone killed off the dry-erase board—the heavy, smudge-filled fixture of offices everywhere. The [Post-it Flex Write Surface](https://www.3m.com/ "undefined") is just the dry-erase slayer we’ve been waiting for. Available in 3- to 50-ft. rolls, the Flex Write is effectively a whiteboard sticker that you can unroll, unpeel and slap wherever. “My son’s calculus class got some and covered a whole wall,” says Amy Hester, a 3M product developer. Thanks to some next-level office-supply science, the Flex Write Surface ($36 for 3 by 2 ft.) works with either dry-erase or permanent marker. “When you spray water on the permanent ink, you can actually see it lift and wash away,” adds Hester. _—J.R. Sullivan_ **Buy now:** [3M Post-it Flex Write Surface](https://amzn.to/3pA4v5l "undefined") ```json [{"@context":"https://schema.org","@type":"Article","@id":"https://time.com/collections/best-inventions-2020/5911406/post-it-flex/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/collections/best-inventions-2020/5911406/post-it-flex/"},"headline":"The Roll-Your-Own Whiteboard","datePublished":"2020-11-19T13:51:36.000Z","dateModified":"2026-03-02T23:45:53.736Z","description":"","url":"https://time.com/collections/best-inventions-2020/5911406/post-it-flex/","keywords":["list","franchise","best inventions","Best Inventions 2020"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt53d0f2358eb89095/698a144586f68e3e176ef69d/best-inventions-of-2020-Post-it-Flex-Write-Surface-5.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"TIME Staff","jobTitle":null,"url":"https://time.com/author/time-staff/"}],"creator":"TIME Staff","articleSection":"","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blt53d0f2358eb89095/698a144586f68e3e176ef69d/best-inventions-of-2020-Post-it-Flex-Write-Surface-5.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https://time.com/collections/best-inventions-2020/5911406/post-it-flex/","name":"The Roll-Your-Own Whiteboard"}}]}] ```