Sea To Summit ApIII Sleeping Bag 4 Degree Down

Nothing takes the fire out of your engines more than trying to sleep in a soggy down bag, so Sea To Summit designed the ApIII Sleeping Bag to block outside moisture and prevent condensation build up during long stays at base camp. To achieve this feat, Sea to Summit made this bag with lightweight, breathable outer 3D NanoShell fabric with a Nano DWR coating and a silicone condensation barrier just inside the shell fabric to expel any moisture that your body creates during the night.