It?s an intermittent issue and doesn?t always happen. It does hold 2 kayaks. This pair, the Shelby, fits more like a half size too big, slipping considerably in the heel, while feeling too snug on the sides. My regular womens size is 7M. I own 2 pair of Crocs womens Freesail and figured Id try a pair of the classics. The 9M were ridiculously narrow and my toe hit up against the front of the shoe. I wear Fit Flop. Wie beschrieben Thats good for walking, skiing or anything that wouldnt be safe if you cant hear outside noise. was adapting 4 J Bar kayak roof racks wanted a little heavier tie bolts for them as 2 are only used these star thru knob, fit the bill perfectly and are well built, will definitely buy again