re: shell layers, there are just a lot of tradeoffs across the board (not even getting into the universal fact that good coats are pricey as hell)
| Waxed Canvas | Wool | Synthetic | |
|---|---|---|---|
| Pro | Environmentally friendly, can be somewhat waterproof | Environmentally friendly, very warm, water resistant, breathable, insulating even when wet | Can be properly waterproof and also breathable, lightweight |
| Con | Heavy as fuck, you literally can't clean it | Itchy, mothbait, | Environmentally evil, limited lifespan on membranes, performance varies wildly |