Mac in a Sac is our best waterproof jacket to date. Featuring a host of features for a great price and a wide range of colour / size options... Its not hard to see why it's our best seller! Our waterproof fabric with taped seams has been independently tested, so you can be sure of staying dry in the rain. Every Mac in a Sac packs away into its own supplied bag, so it's great for a backpack or daybag.