BD. At least four of the group I bp/snow camp with here in Kalifornia have a BD Hilight or Firstlight. Mine is not very waterproof, I'll get spritzed in a rain, I would not care to wait out a rain in it. I notice theirs are a little greenish in color, mine is yellow. It is highly prone to condensation/frost inside, it helps for the most part to leave it pretty open, then it will still have frost inside at times, can't be helped. I usually have the one vent open all the way and the door half to 3/4 zipped up. The only time I will have it zipped up all the way is in a snow, then I try to open the top of the vent and door a little. You'll still have to push snow away from the walls. It is nice as the stake points are at the corners, so no guying out unless in high wind and you can use points higher up at the corners for that. I've had it out mostly in single digits or teens F, but had one night last winter close to home on the Plumas NF where my Zip-o-gauge showed -3 or lower, can't remember now. It took 10 minutes to stuff my Driloft sleeping bag in the morning as I had to warm my hands numerous times on one of my vintage kerosene stoves. I've used my 3 season SD Halfmoon on numerous trips before, it did not take an unforecasted, high wind, 2' snowfall too well, I can to hold the corners up during high gusts in the night. The poles got bent some, but I have straightened them pretty good.