Most decorative covers are machine-washable in cold water. Close all zippers before washing to prevent damage.
Occasionally remove the cover and let the mattress air out in direct sunlight for a few hours to prevent moisture buildup and odors. If you'd like to narrow down your choices, let me know: What size is your mattress (Twin, Full, Queen)? Do you have pets or kids ? Is it mainly for sitting or sleeping ? How to Shop for a Futon Cover: A Comprehensive Guide buy futon cover
Cotton is breathable and soft, making it ideal for regular sleeping or lounging. Most decorative covers are machine-washable in cold water