Since purchasing I’ve not had to actually use this mack in the rain but the size is true to normal and I love the colour. The material is quite rubbery to the touch so I’m sure it will be totally waterproof. I have a hiking coat but bought this for more casual walks out, shopping in the rain. It has a thin cotton lining to stop ‘sweating’ on warmer days. I’m am very happy with this Mack and feel that it is good value for money.