Terra nova moonlite bivi sleeping bag cover description the moonlite bag cover is an asset to our award winning range of bivi bags this waterproof and breathable bivi has been updated in 2014 and now has a mesh upper section with zip closure at the head along with a draw cord closure at the entry it is fully seam sealed making it the minimalists perfect choice to couple with a tarp the moonlites tiny pack size and weight also means it can double up as a survival bag on longer trips u