Groundsheet made from polyester coated fabric, 450g/m2, for the Winnipeg size 3 frame tent. At a whopping 47 square metres, this is a huge groundsheet but well worth the investment. It protects the ground, keeps the damp away from the inside of the tent and will battle faithfully to prevent water from getting in through the ground (it's not so good against floods, tidal waves etc. so don't be too upset if those get the better of it). A great addition if you don't want the grass/ your lawn ruined by people constantly walking all over it.