OneTigris Hideout Hammock Underquilt, Lightweight 4 Season Hammock Gear for Camping, Hiking, Backpacking, Travel, Beach, Backyard, Patio, Portable

I picked up this secondhand hammock liner from the thrift store, it's super warm, I bet it would add a good bit of insulation to your setup. https://a.co/d/0iJN3gj1