Warbonnet Spindrift SockWarbonnet Spindrift Sock is a hammock sock specifically designed for Ridgerunner series of hammocks. Its essentially a large sack of breathable fabric that the hammock hangs inside of. Its used mainly in cool to cold weather to fully block the wind, and to increase inside temperatures by up to 10 deg. It is a water and wind resistant, breathable microclimate for your hammock. Although not a full substitute for a tarp, it does provide full protection