Pads between a nylon hammock and nylon sleeping bag can slide around like skates on ice. The result can be waking up with cold spots underneath because the pad slipped out from underneath my sleeping bag and since all of the loft is compressed under me it gets
COLD on the bottom of that hammock. A normal sleeping pad will even jumble up near my feet, interfering with movement and even compressing the top of the bag creating cold spots on the bottom and top of the sleeping bag that wake me up.
If you want or have to use a pad get one of of the winged pads like
@Gary Knowels mentioned that is specifically designed for hammocks
Explore the great outdoors with confidence, equipped with gear from Campmor - Your one-stop shop for all things camping and hiking. Find everything you need, from tents to backpacks, at unbeatable prices. Get ready for your next adventure with Campmor!
www.campmor.com
But a separate down or synthetic fill top quilt with a footbox gently drapes over me, doesn't restrict movement and keeps me warm on top. A bottom quilt BENEATH the hammock wraps up the side that I sleep over and in, not on, so its full loft covers me and the top quilt
a full 180°+ around and above keeping me warmer than a mummy bag with a compressed bottom. I wear a Caprilene or similar poly... balaclava and a fleece cap as a nightcap because my top quilt doesn't have a hood. When I bought my set most top quilts did not. Quilts are also lighter, and waaaay more comfortable providing unrestricted movement and help a me get a restful night's sleep. It's a game changer, like sleeping on cloud

. I keep the balaclava and a pair of dry thick wool socks or down socks and booties (I have two pairs of the old Frostline kit down socks and overbooties) packed inside the quilt so they'll always be there and ready to slip into. My Clark hammock has pockets below the hammock and above the bottom quilt so my insulating layers clothing is kept toasty warm by body heat, and they help keep me warm while sleeping over them, not on them. It's nice on a cold morning to reach into the pockets and pull out my nice & warm trousers, fleece or down sweater and jacket to put on.
The Clark Jungle Hammock's separate but integrated zip open bug net and "weathershield" combo hood also keep the inside of the hammock noticeably warmer on cold nights.