Our Down Alternative Duvets are filled with between 200GSM - 430GSM hollow fibre and encased in 100% Cotton fabric. Our Down Alternative Duvets feature baffle box construction which is a method where the product shell is sewn in boxes or pockets and each pocket has a uniform amount of fill. Air gets trapped in each pocket and results in a fluffy duvet/topper. This method also ensures that the filling is balanced and also prevents the duvet from clumping.