The terra nova discovery bivi is made from gore tex flo2 fabric and has taped seams guaranteeing it s waterproofness and breathability to make this the ideal bivi not just for emergency situations but also for spending a night under the stars wild camping or adventure racing gore tex is known worldwide for its superior level of waterproofness and breathability this bivi will ensure that you are protected from the rain and comfortable thanks to the breathability which is incredibly important in s