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The Godskin Swaddling Cloth is one of the Talisman items in Elden Ring that can increase HP gained when worn.
The Godskin Swaddling Cloth can be obtained in the Spiritcaller's Cave located near the bottom of the large frozen lake in the East Mountaintops of the Giants. It is claimed after defeating the Spirit-Caller Snail that summons both Godskin Apostle and Godskin Noble in a long boss fight.
The Godskin Swaddling Cloth heals around 3% of your HP for successive attacks, which can vary greatly depending on the weapon being used.