If you aren't familiar with the Sprush, as it's name hints, it's a cross between a color application brush and a spatula. The aqua and red sprushes are bendy towards the tip, but where the aqua Sprush feels smooth to the touch, the red Sprush is textured. According to the pamphlet I received with my order, the red Sprush is infused with keratin--not sure what impact that would have on my hair if I were to use it during a relaxer touch up. I'm really skeptical of products that claim to be infused with keratin or oils that will some how be deposited on the hair during use. *Shrug*
The green Sprush barely bends and I think it's the one I'm going to use next week when I do my touch up. I'm expecting the relaxer process to go a bit smoother with my new Sprush--I think it's going to be much easier to apply and control/limit the relaxer to my new growth with the Sprush. I'll let y'all know how it goes next week!