I have been searching for a few years for the perfect "stay cool breathable underwire" bra for hiking in the humid southern mountains. FINALLY!Thanks to another reviewer I ordered a size up (not the cup) I normally wear a 34 B so I ordered a 36 B and it fits very comfortably.One thing I wish I could change about this bra is that after hiking and going into an air conditioned space or taking a cool off in a creek you still show your "high beams"!This is the size my sister wears. 34B. This bra is very very tight on the very last possible hook. Also, if it is a sports bra, we would assume that it would normally go over the head and not have a clasp. She has been wearing sports bras for at least 10 years and none has ever had a clasp.OK for an everyday wear product... NOT ok for a Sports Bra. Very little support. Straps are too slim and two hooks in the back only. Fabric is very light weight which helps with comfort, however, would not wear this for any yoga, jogging. WAY too much bounce!Cup sizes were not true to size. Gave them to a relative who wanted them. Relative says they are very comfortable.Not the best for sports bra... normal bra use.It seems a bit tight around the rib cage but I am keeping it hoping it will "open" with a bit of wear. It lifts and separates like nothing I have ever seen. I feel like I got a boob job in it. The entire cut is well designed.The cups are a weird shape - and the band is too wide. Too bad because the Cool Max fabric is hard to find in bras nowadays.Band is too short. I ordered 2 and the first one out of the package is missing a hook. The band that fits around the torso is a strange width and it folds over with any movement; it's scratchy and rubbed the area under my bust completely raw. I definitely do not recommend this bra based on the poor quality control and uncomfortable synthetic materials.This is one of my favorite bras. No padding and great support. I would order up a cup size up and make sure to hand wash.It does the job by holding me together for workouts, hiking, etc.