We purchased 4 of these umbrellas with the additional weight placements to keep the umbrellas secured.  After installing we discovered that the umbrellas do not hold up well at all. We had winds of 13mph when we attempted to use them. The weights were of no use the umbrellas swaying back and forth while being lifted off the ground.  We were not able to use them at all for our event.  What a huge disappointment.  Not sure how we can return them.  They are huge but of no value if there is any type of wind.