Ari A.wrote a review of Luna Sports Clothing JJ's Jersey - Long-Sleeve - Women's on October 23, 2011
Got this for a steal on BT for my GF - I've been snapping up all the Luna gear I can since the clothing line is going out of business. A shame, really, because it's so darn good. She loves this piece, just as she did the Warmup Jacket - great fit in medium (5'9", 140lb), super soft and comfy, and doubles as an around-town sweater because of the discrete back pocket and the wonderful silk/merino feel. Try that with a synthetic bike jersey! Even at the regular sale price, this is a good value...perhaps the original retail price was a little high, and I'm afraid that may have been Luna's demise - it wasn't because of the quality of their products. I've personally spent much more on synthetic cycling tops that weren't nearly as versatile.
As a bike jersey, I'd guess this is good down to about 50 degrees. It's not thin, so I wouldn't wear it when it's warm out, but it's also not windproof, so there's only so much it can do while riding. Very similar thread weight to my 260g merino wool zip-neck from Icebreaker.