Brain Eco Martingale Collar Size:Small Take notes while you unlock

Take notes while you unlock the secrets held within a cicada's call or track down new species of fungus gnats

and will just keep getting softer and fluffier the more times you wash them

and culture -- and now this Linguistics notebook can inspire all your communication

What do you get when you cross chemistry with canines

With a deep blue background featuring white diagrams of the night sky in both hemispheres

Brain Eco Martingale Collar Size:Small Take notes while you unlockA brainy collar for a smart dog! Martingale collars are what you need if your dog's head is smaller than its neck like a greyhound or a whippet, any dog prone to slipping their collar, or dogs with delicate tracheas and necks like chihuahuas and pomeranians. Our Martingale collars are available in three sizes, adjustable, and built with rPET webbing (made from recycled soda bottles).