feathers ...
i remember dyna vanes ... i used to shoot them ... but it's been many, many years since i shot a vane ... i shoot feathers even from my cam & 1/2 hoyt havoctec ... hoyt zr200 and hoyt accutec ...
feathers can be waterproofed ... dri-fly, hair spray etc ...
more expensive and less durable in many cases than vanes but much ezier to tune with and much more forgiving ... (not to mention much less weight on the rear of the shaft ...)