I don' t own the Cody slate but can tell you no slate call will work in the rain. Now the glass, crystal, andozied alumnium, sla-tek, frictionite, etc... will work in the rain with acrylic, glass, carbon, " speciality" strikers such as Woods Wise mystic stick, etc... You need to keep slate dry, of course you can use a bread bag to call in or something to that effect.