Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: How are these with sound leaking?
Document: Added warmth to the music I listen to. Added more bass too. Much more comfortable than silicone tips. Isolates music extremely well. Unless your IEM is known for leaking sound, you won't be bothering anyone near you when you turn the knob up to eleven.
With the complys in you will not hear any difference and this does improve the sound quality.
Granite they are expensive, but these block out so much sound its not funny, and they are very comfortable.
These are must have to upgrade the sound quality of your earphones, of ANY earphones actually.
Did not work for me. Bass sound was diminished very drastically. I Would not recommend these based on my experience.
Great addition to your ear buds to turn them into something that actually stays in your ears and blocks sound.
They work fine and there pretty comfortable, but i had to basically force them on my Skullcandy Supreme Sound Ink'd earbud headphones
Helped change my headphone sound from good to amazing! These are one of best purchases you can make for headphone sound
These tips fit tight on the earbuds I have and don't block the sound at all. They feel great in my ear and stay in there despite moving around.
the sound of these earbuds tips when paired with the Soundmagic E-10 Earphones is awesome. The sound quality  is worth 10X what I paid for them.
Answer: Very good