If I were a runner, then any degradation to the reflective aspect of these sleeves (including any potential vulnerability to machine washing [as reported in a different review]) would be an issue.
As it turns out, my primary intended use of these sleeves is for protecting my arms from the sun, & the UPF aspect was key.
The snug fit is in marked contrast to a different brand of compression sleeve I tried previously. The other brand didn't have much of a 'hold' on the arm, & would slide down, whereas this brand has the 'shiny, rubbery, whatever-it-is' material on the inside at the top of the sleeve, to aid in its 'gripping' around the arm, & I can't imagine these sliding down (I'll need to confirm that they hold during active use of my arms, & sweating).
I concur with a previous reviewer's comments that these sleeves run quite small. When I first opened the package, I wasn't sure whether I'd be able to pull these Large/X-Large sleeves up *to* an elbow, let alone past one, but it turns out that this size fits me relatively well (as in, I can pull these up to within 1-2" of my armpit, & I can feel the compression, but it isn't 'too much' [yet... after wearing them for several minutes (albeit while simply sitting), it's bordering on being slightly uncomfortable in the uppermost aspect of my upper arm]) -- but I can't imagine these fitting someone with bulky arms.
Until I 'kick the tires' on these, & clarify whether they hold after multi-hour wear, & during & after sweat, I'll refrain from buying any more -- however, if they prove to be reliable in their 'hold' on my arms, & protect my arms from the sun, I would definitely buy additional sleeves.
I'll update this review after testing these a bit (including multi-hour sun exposure, to clarify whether the reported UPF protects me in a manner that UPF 50+ should).
In the meantime, I wanted to convey a warning to others about these sleeves running quite small.
Lastly, the pocket on the sleeve is smaller than the picture would seem to indicate (proportion-wise, relative to the length of the sleeve, etc.). The pocket on my sleeve is 2-1/4" wide x 3 inches long (when unstretched). When on my arm, the width gets stretched a tad (to approximately 2-1/2" wide).
