Here's what other sites are saying:
Like warm pie and ice cream, the NRS Women's Guide Shirt combines two great products into one outstanding one. HydroSilk(TM) upper and MicroLite(TM) body give you both sun protection and soft comfort.The sleeves and collar are 8-oz nylon/spandex HydroSilk fabric, with maximum 50+ UPF sun protection rating.The body of the shirt is MicroLite fabric, a 5-oz nylon/spandex blend that breathes well, wicks moisture away from your body and has a 45 UPF sun protection rating.Light in weight and silky soft against the skin, this shirt works hard to keep you comfortable, while you play hard.Quick drying, very breathable.Relaxed fit, point collar, vee neck, long sleeve.
- NRS refers to the women's version
Spend a day out on the river without fear of sunburn or overheating in the long sleeve Guide shirt from NRS. Your skin will be amply protected by a soft nylon and spandex blended MicroLite fabric body rated to 45+ UPF - supplemented by panels rated to 50+.
- Mountain Gear refers to the men's version
Your shoulders, neck, and arms get a lot of sun exposure as you paddle, so NRS made the Men\222s Guide Shirt with UPF 50-rated fabric in those areas. Since your torso also gets sun, and gets hot and sweaty, the body of this shirt uses UPF 45-rated fabric that feels super light and wicks moisture. Zip up the front for collar coverage.
- Backcountry.com refers to the men's version