This deal from Wowcher
From £15 for a bamboo duvet cover from Cascade Home – save up to 57%
Get a sustainable new duvet cover or pillowcase. Made from 100% organically grown Bamboo! Comes in four sizes: single, double, king or super-king. 100% Organic, hypoallergenic, antibacterial and temperature controlling. Do your bit for the environment without skimping on comfort!