The Casper Cool Supima Duvet wins out as the best cooling duvet because of its incredibly soft Supima cotton, high-quality two-ply construction, and crisp comfort. This is the perfect duvet cover for anyone who loves slipping into cool bedding at the end of a hot day.Click to see full answer. Just so, what is the coolest duvet cover material? The Best Fabric for Duvet Covers Fabrics to Avoid. Avoid upholstery-grade fabric. Pima, Supima and Egyptian Cotton. Pima cotton, Supima cotton and Egyptian cotton all have high thread counts between 200 and 300, making them super soft and cozy. Silk. As a luxury fabric, a silk duvet cover is elegant and also comfortable. Blends. Also, what is the most breathable duvet? Natural filled duvets using goose or duck down are naturally breathable and reduce the moisture trapped in our bedding as we sleep. We recommend Hungarian goose down which provides three to four times more air circulation than synthetic materials allowing moisture to escape more easily. Keeping this in consideration, what is the best duvet cover? Best Duvet Cover 2020 Best Sateen Duvet Cover Best Luxury Duvet Cover 10 Grove Hudson Percale Duvet Cover 10 Grove Hudson Percale Duvet Cover 10 Grove offers four collections of luxury bedding; the duvet cover found in their Hudson collection features a modern, bordered style and is priced competitively. Best Value What is the lightest material for a duvet cover?Percale is woven in a one over one under pattern making the cloth tight but still breathable. Luckily, duvet covers are offered in Percale cotton as well. Generally, cotton is a soft, lightweight material but not all kinds of cotton last long.