You don't need it for waterproofness, NEMO floors have that covered, but if you will be spending a lot of nights on gravel, this could add longevity to your tent.
Features : • Floor Fabric : 70D PU Nylon (3000mm) • Included Accessories : Drawstring Stuff Sack
Details : • Floor Dimensions : 81 x 47 (footwidth) 39 in / 206 x 118 (footwidth) 98 cm • Minimum weight : 6.9 oz / 196 g
