A:Answer Greetings from the Intel team. Thank you for your question.
Based on the product specifications reference (PSREF), the Lenovo - IdeaPad Flex 5 model 82Y0000FUS has the following case material specification: Aluminium (Top), PC-ABS + 40% GF (Bottom). For further information, check the PSREF:
https://psref.lenovo.com/Detail/IdeaPad_Flex_5_14IRU8?M=82Y0000FUS
For detailed information about the Intel® Core™ i5-1335U processor, visit:
https://ark.intel.com/content/www/us/en/ark/products/232153/intel-core-i5-1335u-processor-12m-cache-up-to-4-60-ghz.html
Thank you for choosing Intel! Emilio_Intel