Can I turn a no need to turn mattress?

I am interested in a John Lewis natural collection linen 5000 mattress.
It says NO NEED TO TURN . Question is, can it be turned or does this phrase mean the same as NO TURN? I have seen one new at a friends house and the bottom seems the same as the top in terms of being tuftedanx having padding rather than the springs just under fabric .
Thanks
PS. Very impressed by your website. Thanks.