Optim insulation is a hybrid material that combines the biostability and flexibility of high-performance siliconerubber with the strength, tear resistance and abrasion resistance of polyurethane, to provide increased durability and flexibility.
The MDR-XB60EX Sony Extra Bass headphones are supplied with hybrid siliconerubber ear buds in four different sizes for a secure and tailored fit, along with uniquely designed noise isolation ear buds in three sizes.
In that procedure, doctors put a silicone tube, which is like a big rubber band, around the top of your stomach, restricting the amount of food you can take in.