Turbo Special Design: The turbo deisgn which isolates sound perfectly will improve the bass around 5%. Quality Silicone Material: Elastic to touch Strong and durable to use, comfortable and soft for your ears Easy Insatllment: No tools needed, two steps installation, only seconds you will have a new earbuds. Packing List: 6pairs/pack with S.M.L sizes. 2pairs for each size. Packed by PP hard box. Turbo Special Design: The turbo deisgn which isolates sound perfectly will improve the bass around 5%.