UV Protection Umbrella

Before buying these umbrellas, I read its description about its weight and the UV protection. I should have bought one first but I bought three instead, thinking that it would save me time and money. However, out of the three umbrellas, two of them do not work well whenever I try opening the umbrellas. I have to use a lot of strength to enable the umbrellas open properly when the top parts clicked into place. Each umbrella is also not light in weight, as described. I could have given a 5-star review if not for the difficulty in opening those two umbrellas.