The Tungsten Rainbow Warrior is a staple fly for any river or spring creek.  This new Pink version is going to be a hit from coast to coast.  The Rainbow Warrior is a fast sinking fly, great for dropping off a dry in the summer or nymphing slow runs in the winter.  The tungsten head gets the fly down as quickly as possible where the Pink Rainbow Warrior is effective at imitating larger midge or mayfly nymphs.