D70 – 4-seasons duvets
A 4-seasons duvet is two duvets that can be joined into one duvet.
Cool duvet + Medium duvet = Warm duvet.
This means there is a COOL duvet for warm nights, a MEDIUM duvet for fall or spring. And when combining these two, you
get a WARM duvet for cold nights.
They can be buttoned together for easy comfort.