Here's where you can buy your official Eagles underdog mask

Philadelphia Eagles Fan Custom Canvas Pet Portrait – Noble Pawtrait

Make Your Own Underdog Mask - 6abc Philadelphia

In Pictures: Super Bowl 2018, New England Patriots vs Philadelphia Eagles

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NFL Championship Sunday Recap: The Eagles Are Underdogs in Name Only - The Ringer

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Philadelphia Eagles dog masks go viral after upset playoff win - Sports Illustrated

You have fun when it's time to have fun and get serious when it's time to get serious

Eagles fans swarm Lincoln Financial Field in dog masks for NFC Championship (PHOTOS)

The Eagles are underdogs in the NFC Championship. Yes, that's good news.

Where Did Eagles Get Those (Under)Dog Masks From? Here's Where You Can Get Yours – NBC10 Philadelphia

MOLEZU Halloween German Shepherd Dog Head Mask,Novelty Party Costume Super Bowl Underdog (Coffee) : Clothing, Shoes & Jewelry

Mike Trout Embraces Eagles' Underdog Role