A player wearing frog-leather armour.
Frog-leather armour (also known as Frog-skin armour) is a Ranged armour made by the Dorgeshuun goblins. Frog-leather armour is members-only, and players must have level 25 Ranged and level 25 Defence. This armour is bought from Reldak in Dorgesh-Kaan.
Although they are not a particularly war-like race, the Dorgeshuun see the value of their skills and are not completely against fashioning armour to fit the humans that come to visit their city.
Zanik appears to be wearing this armour set, most likely because she lives in Dorgesh-Kaan and is a ranger.