Very well designed and amazingly comfortable. I've been looking for something like this from EB and now they've finally offered it. The IgniteLite Flux Stretch Hooded Jacket is a fantastic mid-layer or a comfortable casual outer layer. A generous amount of PrimaLoft makes it light and warm. I had a chance to test it over several hours outside while walking with only a tee shirt underneath in low 40 degree weather and it was very comfortable. I never got cold. It's a perfect mid-layer under my BC Igniter Stretch Jacket when I travel to northern California. It's true to size. I'm 5'9 and 180 lbs. 43" chest, 32" waist. I usually take a large in EB clothing and the Flux Stretch Hooded Jacket was a good fit in that size.