I am so happy I decided to try these. I have a few morphe goat hair brushes. One in particular, 441, I purchased one year ago and since the first time I washed it, it poofed out and lost its form. I use my brushes 2x, tops, then wash them. I tried a few different methods to try and get the shape back, but no matter what as soon as the brush would dry, it would floof back out. Until last night. I cut a few of these brush guards in half, and washed all my blending brushes. I put the guards on and hung my brushes in their tree and when I took them out,ALL of them held their shape. Even the 441! I played with the bristles a bit, and it kept its shape! And the guard returned to its original form immediately after removal. I highly recommended these guards. Especially for the price! I will update tomorrow after I do my makeup only if the brush gets all crazy looking during application. (Will be too big for small, precision blenders. Will be great for highlighting brushes , smaller blush brushes, and they sent a bonus of 4 big ones. I washed a powder brush and it's still wet after 24 hrs. But it's shape is great and it should be dry by hour 30ish)