My customer did just that with indigo denim slipcovers for her Lake Michigan cottage.
I used a 14 oz. yarn-dyed washed denim. This durable cotton cloth is family and pet friendly and offers smooth coverage over textured upholstery. Great for everyday slipcovers.
To give this slipcover the best fit and function possible I inserted a placket zipper in the back for easy on and off. I also detached the back cushion, added new poly cluster fill and made a removable cover.