Just reposting this deal - as price has dropped again....RRP £49.99 - most places around the £30 mark.
and here's the official info....
Enjoy great sound quality with the Denon AH-C360 headphones. They feature canal style in-ear buds which help to reduce external noise, while the ergonomic shape fits snugly in the ear for maximum comfort.
An acoustic optimiser structure helps bring out ideal acoustic characteristics in your music, by adjusting sound pressure balance around the diaphragm. Includes 0.8m extension cable, cable clip, carry case, and silicon ear pads in 4 sizes (XS/S/M/L), allowing you to select the right size for your ears.
Cable length 0.7m
Model name / number AHC-360