Membrane

Membrane is one of the stealth Monster Perks in Unfortunate Spacemen.

Description

 * STUN GRENADES have NO EFFECT on you, in or out of Monster Form.
 * You can SEE THE HEALTH of nearby Spacemen.
 * You will NOT BE DETECTED by Tripmines while in Human Form.
 * Your Monster Form DOES NOT SHOW UP on THERMAL IMAGING OR SCANNERS.