Review on O'Neill Men's Hybrid UPF 50+ Sun Sleeves: Ultimate Protection for Outdoor Activities by Josue Porter

First of all most of the comments are about size. I posted their sizing chart which no one seems to be able to find. I have 6 1 with biceps 10.5. On the size chart you can see where I end up. I received a large regular size and it fits perfectly. Stretched but not stretched, it almost reaches the armpit. It ends just before the smallest biceps and just before the beginning of the brachialis. Exactly where you would like something like that. It's snug against the skin, no pockets, but I don't notice any compression. When I took it off after about 15 minutes of testing there were no compression lines on my arms so I'd say it fits perfectly. I thought they were made out of the same material as their rash guards. First, because this material works great, and second, use the same material for inventory. It's not the same material. This one is more like a thin sock. I don't like this material but maybe it's because I wanted spandex to be used in protective rashguards. It has noticeably less stretch than rashguards but fits perfectly so it's not an issue. If I keep a layer on without stretching I can see through it like pantyhose so I don't know how good the sun protection will be. One of the things the Cancer Foundation says is that for good sun protection, you shouldn't see a significant light source through the clothing you intend to wear for protection. It definitely doesn't pass that test, but their logo is also on the packaging, so who knows. Haven't spent a full day in the sun with them to say for sure, but I have my doubts. Just use this size chart and choose slightly larger. The material is like a sock with a slight stretch. SPF 50 but I can see through the material. After spending a full day in the sun with these I'll edit to see if they really work.