The Second Arrow has long been one of Wilderness EquipmentÆs most popular lightweight tent and it just got better. Thanks to the introduction of SN240 nylon (used in the fly fabric) this newest model has become significantly lighter and more compact. Not only is the SN240 fly one of the lightest (if not the lightest available) the floor is probably one of the most waterproof (8000mm waterhead rated). 2.6kg total weight.