No, you don’t need a fursuit to be a furry. It’s a wide and open culture that accepts your desire to be a furry and how you choose to interpret your fursona. You might prefer wearing t-shirts and shorts, perhaps a t-shirt with a furry favorite image printed or ironed onto it but even that’s not necessary. What does matter is to have a wholehearted love for the furry fandom and a desire to be a part of it.