My personal notes are that these headphones are awesome for the price. Used them this weekend on a plane and they shut a lot of noise out before you even turn music on.
I used them with my little A series walkman and had volume at 18 out of 30 and couldn't hear anything else on the plane, so they get my vote.
Also they have the Y-type cord which means both headphones are equal length, not the ones where you have to put one round the back of the neck which can be very annoying!
heres the info from play.com
# 9mm XB driver unit fills your ears with deep bass, bringing you closer to the club music you love in optimum Sony sound quality
# Angled-structure in-ear silicone buds for total wearing comfort
# Neodymium magnet delivers powerful clear mid-range sounds, perfectly paired with the deep thumping bass line
# Tightly sealed acoustic design for great sound isolation and rich bass sound, to stop any of your music leaking out
# Oxygen Free Copper voice coil for powerful handling capacity (1000mW)
# Durable and lightweight 1.2m flat cord, Y-type, for tangle-free listening
# 103dB/mW sensitivity for a strong sound output
# Wide frequency response range, 5-23,000Hz, reproducing a smooth low bass line right through to the highest pitch treble
# Gold-plated L-shaped stereo mini plug
# Hybrid silicon earbuds in S/M/L sizes for a perfect in-ear fit
Also same price at amazon thanks to the heads up from snakebite