Guard against cracks with this easy to use humidifier by Planet Waves
• Protects your guitar without damaging the finish.
• Suspended by the strings, never touches the guitar body.
• No clips or fasteners that can scratch the guitar finish.
• Open-cell phenolic foam insert disperses moisture slower and more evenly than sponge.
• Foam insert shrinks less than 1% when dry vs. sponge, which can deform dramatically.