Related Clues:

• Well-ventilated
• Like old socks, maybe
• Like Swiss cheese
• Moth-eaten
• Not likely to hold water
• Honeycombed
• Unable to hold water
• Like Swiss
• Needing darning, maybe
• Allowing passage in and out
• Needing darning
• All head off to Golightly
• Like Swiss cheese?
• Like a moth-eaten coat
• Full of perforations?