They don?t seal correctly and I had one come off while going thru a touch less car wash. I honestly have no idea what they are talking about, not at all. Why 3 stars then? The parcel was packed into an envelope and arrived with heavy damage to the packaging. Then I bought the bi-pod version which is very good and allowed me to make very good shots. If another slider could be made for this that would just be awesome. They are perfect for traveling, storage, and protection of the Soundlink; even though the Soundlink is waterproof and shockproof. But Haflinger now is making these in several factories and in several eastern European countries. It comes with a sticky so your AirPod case fits snugly inside without risk of slipping out. Ill have a full closet of them! Also don?t like the placement of the thing part.