The Alpenglow is a technical fitting base layer that offers comfortable fit and protection from overheating with the BD.cool technology, making it perfect for climbing and other high activity sports.Black Diamond says:A technical fit paired with a highly protective fabric, the Black Diamond Alpenglow Crew offers coverage on desert multi pitches, high-alpine approaches and hot crag sessions. Featuring UPF 50 and BD.cool mineral based in-fiber cooling technology, this fabric reflects 71% of near-infrared rays and reduces the wearers temperature. A layer of protection to your arsenal, with a pullover design, plus Polygiene odor control, the Alpenglow Crew offers the ultimate in performance and long-wearing comfort.Our VerdictThe BD Alpenglow is designed to cover the full range of climbing experiences from hot to cold conditions where you will be building up a sweat and need to have something that keeps you cool and prevents condensation from building up.As a climber it is always a struggle to find a base layer that keeps you cool without making you smell, and just generally feel a bit uncomfortable when you are pushing hard and building up a sweat. However the BD.cool in-fibre manages to keep the temperature down without either restricting movement which is obviously of key importance in any climbing or active sport, as well as creating any discomfort from the build-up of wicked moisture.I definitely found the looser fit of this more comfortable than a traditional tight fitting base layer and was something that I could wear all day without really noticing I was wearing it.- Reviewed by Ultralight Outdoor GearFeaturesUPF 50 sun protectionBD CoolTM mineral-based in-fiber cooling technologyUnderam gussets for improved range of motionPolygiene Odor Control TreatmentSpecificationsSmall weighs: 154gMedium weighs: 162gLarge weighs: 184gXLarge weighs: 199gMaterial & ConstructionPolyester Stretch Textured Knit (87% Polyester, 13% Elastane, 200gsm)Fit: RegularHelp & advice:The Ultimate Guide to Lightweight Baselayers

The Alpenglow is a technical fitting base layer that offers comfortable fit and protection from overheating with the BD.cool technology, making it perfect for climbing and other high activity sports.Black Diamond