Great layering shirt
The Delta LT Zip is light but warm and soft. Excellent for insulation as a mid-layer but good enough to be worn alone as a warm baselayer. I was surprised by how form-fitting the shirt was. I purchased an XS (I'm 5'4, 100 lbs) and it fits perfectly. Finally, a shirt that fits well! Great to wear it as a baselayer/midlayer beneath a Gore-Tex windproof jacket during cool brisk autumn walks.

beautiful and functional
I love this shirt as a fall/winter midlayer for hiking. It is very warm, yet wicks the sweat away. I learned early on that there is no bad weather, just bad equipment and this layer is part of my system for enjoying hiking in the wintertime. I find that this brand runs slightly smaller than Patagonia. If you do not like a slim fit, I would order up a size. That said, it is extremely figure flattering and not boxy. The colors are gorgeous. This is worth the money.

Love Arcteryz products
Great quality, very form-fitting, lightweight, durable. Typical Arteryx quality. Great for cold weather activities as a base layer. I use it for cool weather biking, paddling sailing.

"go to" clothing
This has become my wife's favorite go to second layer. It is light and fits relatively small (tight), but is very versitile and surprisingly warm. This is the perfect mid layer for moderate outdoor temps, but is equally useful for everyday around the house or camp activities. Temperature regulation/control is very good, and this is a quality constructed piece of clothing. Recommended for sure (just wait for a sale...full price seems a bit high)

Super
A gift to my girlfriend, the Delta LT couldn't be better. Fit was perfect, tight enough to not get in the way, but flexible in the arms. A great layer for a slightly cool day.