Howdy, On this page I would like to remove the grey frames

Howdy,

On this page I would like to remove the grey frames around the images (see attached screen capture).

I would also like to increase the size of the image boxes so the last image "Foot Pod Technology" is not cut off.

http://m40.siteground.biz/~heartcor/vitalfeet.com/altra-shoes/

Thanks in advance,
Casper