Product with additions as tick boxes?

Hi,
In the site:
http://ukpoolstore.co.uk/acatalog/sp...ing-pools.html

they have the main item with tick boxes below for extras, how is this achieved?

I guess it is a special type of template, but it has me confused


Any pointers would be great.

Using v7

Cheers
Tony

[NormanRouxel]

Read the Help and Documentation for "Components".