This is a brazilian waxing kit and uses a hard wax system to remove the hair. If you are unsure about using hard wax practice first on your legs for application. There are directions included in the package to help you with the application.
Yes all kits are safe for bikini waxing as long as you follow the provided directions included with the strips and the kit. If you have very sensitive skin you may want to look into another option for hair removal if waxing causes irritation.