A versatile Must have in any outdoor Closet, the Patagonia Capilene 2 Lightweight Crew for Girl features open, highly breathable Capilene 2 knit fabric. The lightweight material allows for unhindered airflow and excellent wicking for endurance activities in warm to moderate temperatures. If you're comparing Capilene numbers, Capilene 2 is the fastest-drying Capilene baselayer available from Patagonia. Hikers and climbers like the low-bulk fabric and tapered fit because it layers well with practically any outerwear (Patagonia recommends pairing their Capilene pullovers with Capilene 3 or Capilene 4 fleece in frigid conditions). Patagonia gave their Capilene 2 Crew a curvilinear construction with seams that refuse to chafe beneath a pack or climbing sling. Capilene 2 is also made from quick-wicking, fast-drying 54% post-consumer recycled (and 100% recyclable) polyester that's treated with Gladiodornatural odor control. In a recent research program, Common Threads Recycling Program demonstrated that the environmental impact of recycling worn-out Capilene base layers into new polyester fiber is significantly lower than making that same fiber from virgin materials. When you consider that worn-out garments are diverted from trash incinerators, making new polyester fiber from recycled garments results in an energy savings of 76% and a CO2 emissions (those greenhouse gasses) reduction of 71%, versus creating that fiber from new raw material. It's a design that you can feel Great about anywhere on the planet.