TRA, The Resistant Assistant, is a three minute pre-softener that deposits hair color quicker on super resistant hairlines, trouble spots and whole resistant heads. TRA can be used with any manufacturers, color/chemical lines and is perfect with permanent, semi-permanent, demi-permanent color. TRA can also be applied before wrapping perms to soften resistant areas. TRA on coarse hair prior to straightening to help breakdown the curl/wave faster. TRA works in combination with all POWERTOOLS products.