Part 3 SLC/NYC Athletes are benefitting from the surge in types of high performance textiles/fabrics...so much so it seems like items bought just 3 years ago just seem so ...Windows XP ish. From Primaloft-the first synthetic insulation we ever wore-comes a microfiber engineered with breathable warmth technology and multi-directional stretch- aimed at the high-output active types... PRIMALOFT GOLD INSULATION ACTIVE ...year round wearable-depending how apparel makers use it...as a light liner material-mid-layers for day training- to breathable stretch shell materials-like LL Bean's Mountain Hoodie Pro hooded fleece jacket, pictured below. No surprise-adopted by many labels, ALREADY! handsome and functional-available now-LL Bean Mountain Pro Zip Hoodie ( men's ) features 60 grams Primaloff Active Gold insulation in front, back, and hood for warmth, range of motion and breathability-side panels and sleeves are uninsulated to vent excess heat, elastic pull cord at hem......