Sleep resistance

Sleep resistance is an intrinsic which prevents you from being put to sleep by wands of sleep, potions of sleeping, and sleeping gas traps. It does not, however, keep you from falling asleep when wearing an amulet of restful sleep. When you acquire the sleep resistance intrinsic, you get the message "You feel wide awake!" It can be acquired by:

• Playing a Monk or Elf of level 4 or higher
• Eating a monster which confers the intrinsic (e.g. elves of all kinds, homunculi, gelatinous cubes)
• Being polymorphed into a naturally sleep-resistant monster

Wearing a ring of free action prevents all of the same attacks as sleep resistance and more, but for the purposes of the intrinsics menu does not technically count as sleep resistance. If you wear a ring of free action, you do not need sleep resistance (in 3.4.3 rings of free action do not protect against sleep.)