Can I use the duvet all year round?
Absolutely - it's designed that way. In the old days, duvets were assessed using tog ratings so you had warmer ones for winter and cooler ones for summer. With widespread central heating, that no longer makes sense - your winter bedroom is probably warmer than your summer one!
Plus with two different temperature regulating technologies in the Simba Hybrid® Duvet, using an out-of-date way to assess how warm it is doesn't account for the fact that it's specifically designed to be the perfect all-year-rounder.