Highly likely to scratch the vehicle paint or round out the fastener head as you must do this without direct sight to the fasteners between the roof and bar. They fit slightly large, Im a 10. kavu backpack As for sizing, although I do not take an extra wide shoe, I do take a shoe thats slightly wider than normal. If at all possible he sticks to flip flops and doesnt like slides. kavu backpack They sew a tag on under where your foot goes (between your heel & the middle of your foot)& it stabs the bottom of your foot. kavu backpack So disappointment with this product! I will buy this product again if i need the storage space. Fairly sturdy, right size for tight laundry closet, stackable. kavu backpack Likely youd want to heat it up in the oven and stretch it a bit somehow if you have this issue, not sure the best temperature and way to stretch. They keep disconnecting.
kavu backpack