hello i'm new here, i just got my first hammock yesterday in the mail its an explorer ultralight and i love it i hiked out into our woods and slept out over night, and i'll tell you i've never been so comfortable in the woods before, my feet got kinda cold and i still need a good sleeping bag but it was great and i'm looking forward to many more nights in it . i was just wondering what you guys use under you to stay warm?, or what a cheap way is until i can get a better insulation system. thanks