This Slumberdown Cool Summer Nights 4.5-Tog Summer Duvet is lightweight for cool comfort during the warmer summer months. The soft-touch cover and light and cozy hollow fiber filling make this duvet ideal to gently nestle around your body while keeping you feeling cool so you can enjoy a comfortable night’s sleep. Being a lightweight 4.5-ton duvet, it's great for warmer months or if you prefer a cooler, less heavy duvet. Slumberdown Size: Super King