SVAKOM - Alex Neo 2 - Sleeve - Transparant The sleeves of SVAKOM are made of TPE. Usage and time will wear down the sleeve causing discoloration and disfiguration, as well as compromise the integrity of the sleeve. To make sure you get the most out of the product, make sure to get a replacement sleeve if you notice any of these signs. This replaceable sleeve fits the Alex Masturbator as well as the Alex Neo 2 Masturbator.