Choose the garment shape before choosing between models. A vented pant is relevant to movement through changing conditions; the two bib/pant hybrids deserve attention when raised-waist coverage and seated fit are the priority.
Does your existing pant leave a coverage gap when seated?
No: investigate a vented pant
Lone Peak remains a candidate for cooler movement, but its noise and reported wetting after rain may rule it out. Extra features do not cancel either limit.
Yes: investigate the bib fit
Compare the original Wind-Defender and Shift while seated. Shift’s removable hardware matters when it solves something you will actually do.
The Lone Peak review contains both vent praise and meaningful noise objections and a report of wetting after rain. The bib comparison separates new hardware from unproven warmth superiority. This is a shortlist within the documented models, not a claim that one garment covers all winter conditions.
Use the seated fitting guide for either bib. If sustained rain is the defining problem, return to rainwear rather than asking fleece-backed bottoms to prove a role their evidence does not establish.