no problem.
it's down to what they call "ecose technology" basically it is made from more natural materials than your average fibreglass roll, from their website:
"Manufactured from naturally occurring and/or recycled raw materials, and bonded using a bio-based technology free from formaldehyde, phenols, acrylics and with no artificial colours, bleach or dyes added"
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off the top of my head there isn't much of a difference in cost compared to other fibreglass rolls, we use it on all our attic jobs these days because of its easier and healthier to work with, without compromising performance (thermal etc)