... material Keep cool or warm 4hours Durable and reusable,nontoxic OEM/ODM design SGS/TUV ... .Keep cool or warm more than 4hours3.Durable and reusable,nontoxic,safe4.Lightweight:thickness from 2mm~5mm ... ,drawing you can decide it6.Hot transfer printing and silkscreen printing your logo7.Simple but fashionable design ... Great for promotion products ,gifts,bars,etc. Soft Neoprene Can Cooler,Keep cool and warm