Kid Dynamix is a lithe figure in a costume designed for ease-of-movement and eye-catching appeal.  It consists of a hooded jacket over form-fitting bodysuit that shows off his physique, largely in a darker earth-tones with accents of red, including the half-mask that covers his lower face.

It's obviously inspired by the costume used by the golden age hero Dynamix, with touches inspired by contemporary youth culture to avoid looking dated. What can be seen of his features implies youth, perhaps in his mid-to-late teens.

Just as notable are KD's affectations - he moves with a supple smoothness that reveals a natural grace and coordination, often walking along fences or scaling walls he could have avoided simply because he can.