Player > Feats > Accelerated Recovery
Your body knits back together especially quickly while you are resting.
You regain twice as many Hit Points when taking an 8-hour rest. In addition, for each uninterrupted 8 hours of rest you receive, you recover from afflictions as though you had rested for a full day. This effect does not stack with other effects that increase these rates of healing and recovery; if more than one would apply, you choose which one takes effect.