I need some advice from the great minds of BPL to help dial in my girlfriend's summer clothing. We hike in the Yukon territory, and are doing the Chilkoot Trail in August. The item she needs more than anything is a nice warm puffy. However, I was at our local gear store this morning and found an Arcteryx Atom LT on for $100. I couldn't pass it up, despite the fact that it isn't ideal as a belay/camp jacket.
Now, I would still rather just buy her a nice down puffy, but it's not going to happen. You'd think she'd be thrilled with me spending money to ensure her comfort, but she just jokes that I'm her expensive little girlfriend.
So, these are the items she currently has at her disposal for summer hiking trips. Can you offer any suggestions on the lightest system we can set-up, while still offering optimal warmth down to freezing?
Any advice is appreciated.
BASELAYER
-light merino sports bra
-light merino tank top
-MEC T2 long-sleeve shirt
MID-LAYER
-NF 100wt fleece hoodie
-Icebreaker 260wt full-zip
-Vapour-Rise Lite jacket w/o hood
-Arcteryx Atom LT hoodie
SHELL
-Arcteryx Alpha SV
She brings along the base layers and the shell on all our trips, but how can we mix-match the mids to get the most warmth and versatility for her?
Any advice is greatly appreciated.
PS – I know this isn't exactly lightweight stuff, but we are slowly working on it. She does love the Alpha SV though, and refuses to rid herself of it.

