We're working out what we think - we'll add our view here!
Mammut says:
The Aconcagua Light can be worn as a mid-layer for mountaineering, climbing, ski touring or hiking. The high-quality material is lightweight, stretchable and pleasant to wear. The design of the pockets is tailored to the needs of mountain sports enthusiasts: allowing easy access at all times, even when wearing a backpack or climbing harness. A versatile and comfortable mid-layer jacket.
We're working out what we think about Mammut's 2021 Aconcagua Light ML Jacket, we'll add our comments here in due course.