3. Best cotton: Parachute Duvet Cover

- Price: starting from $160
- Material: organic cotton
- Pros: four color options, machine washable
- Cons: no warranty available, more expensive than some other options
This duvet cover uses soft GOTS-certified organic cotton. The company makes it with a simple seam and twill ties in all four corners. It is available in three different sizes, from twin to California king.
The brand says that it is cozy and machine washable.
Buyers can choose from four different colors. They also get free carbon-neutral shipping and 60-day returns.
4. Best hemp: Tuft & Needle Hemp Duvet Cover

- Price: starting from $250
- Material: hemp
- Pros: 2-year warranty period, slippage reduction, and zipper closure
- Cons: fabric wrinkles, more expensive than other options
The company makes this duvet cover with biodegradable hemp and a breathable weave. It has a zipper closure and corner ties that can make it easier to reduce slippage.
Buyers can wash it with cold water and mild detergents, put it in a tumble dryer, and even iron it on low heat.
The brand offers free shipping and returns, a 100-night trial, and a 2-year warranty.