Authentic Prada Nylon Coat. 
Size S - generous sizing and would suit an AU 6-10. 
Please note there are a few tiny, pin point holes to the lining - see last photo (not noticeable at all when wearing). Otherwise great, vintage condition and only worn handful of times. 
100% nylon outer, 100% rayon lining. 
Made in Italy. 

For reference, current Prada nylon belted trench coats start at $5000 on Farfetch.