My simple sleeve is tailored for every Apple laptop. It doesn't add a lot of bulk to the MacBook. Designed to fit like a glove, it's made with natural fibers in the USA. The 3mm thick merino wool felt is a dense padded material and it sits totally flat to use it as a coaster for your MacBook on a table. Super durable Merino wool felt can be taken out of a bag for years without wear. Custom fit for every device.