Related Clues:

• Protection for King Arthur
• Excite, in slang
• Medieval suit
• Fax, maybe
• Medieval Tymes attire
• Heavy coat
• Gmail button
• Mail, for example
• Email program button
• It's hard to penetrate
• Use FedEx
• Galahad's strong suit
• Gauntlets and such
• "You --- Me"
• Cause of knight sweats?