Sleep better under an Ava Innes cashmere guard hair and wool duvet, recognised for it's temperature regulating and breathable properties. Encased in organic cotton and made in Yorkshire, we believe it is the best duvet you can buy. In November 21, 93%* of customers said they were sleeping better under an Ava Innes duvet. *Survey Monkey. Ava Innes duvets are available in a range of weights for all seasons. We stock standard UK duvet sizes and can make any size to order. For couples who prefer different duvet weights, we recommend our partner duvets using ties and loops to connect them. This bespoke option is available in King and Super King size across a combination of weights.