I LOVE these!! I tend to throw my brushes into my makeup bag when I travel and they tend to get smashed and frayed. I know I need to take better care of my brushes since eveyone knows MAC brushes aren't exactly cheap. My solution? The brush guard! These sell for $5.50 on www.thebrushguard.com they have multiple sizes and for this price it is so worth it! I can't wait to try these out after I wash my brushes as my 217 tends to fray and have stray hairs after I clean it. Basically these are made of a stretchable mesh material that you slide from the handle to the bristles and it keeps the shape of your brush and protects it from getting snagged/squished. I love these so much I plan to have a contest in July and have this as one of my prizes. Stay tuned and I hope you get a chance to check these out!