All-Night Mask

The All-Night Mask is one of the twenty-four masks Link can collect in The Legend of Zelda: Majora's Mask. It has the unusual power to keep its wearer awake forever, and is suggested in the game to have been previously used as a torture device.

Link can purchase it at the Curiosity Shop for 500 Rupees on the Third Day, assuming that you stopped Sakon from stealing the Bomb Bag on the Night of the First Day. Understandably, you also require the Giant's Wallet to purchase it. Anju's Grandmother rewards Link with two Pieces of Heart if Link uses the mask to stay awake for the duration of her long stories.

This mask, along with the Keaton Mask and the Goron Mask, can be seen hanging on the wall behind Carlov in the Nintendo Gallery in The Legend of Zelda: The Wind Waker.