Chloroform soaked cloth
From WikiRaider
Chloroform soaked cloth is an item used in the VCI Section in Tomb Raider Chronicles. It's created by combining the items Cloth and Bottle Of Chloroform.
The Chloroform soaked cloth provides an alternative method to get rid of enemies and occasionally it's the only way, e.g. in the Escape with the Iris level when Lara doesn't have the HK Gun. To succesfully use the item Lara must sneak behind an enemy, press the Action button and select the Chloroform soaked cloth (or first combine the Cloth and the Bottle Of Chloroform if one hasn't done so already).