Aqua Quest Defender Tarp - 100% Waterproof Heavy Duty Bushcraft Survival Shelter - Olive Drab, 4 x 3 m

Not the lightest (i did buy a huge one though) as you would expect it's pretty good at keeping the rain off you, big enough to give some dry area's to sit in and very very versatile, i suggest searching Youtube for video's of how to utilise this. strong, well made and just what i wanted when i ordered it.