as Finn, woodhandles as most natural for me. Almost any puukko's here is made from birch or curly birch. Curly birch IMHO is one the ideal materials for knife handle. I also like desert iron wood, ebony and I want sometimes to add maple handles on my collection. I've used curly birch for two decades now on knives and I've never had problems with it moisture, impact, freezing or otherwise. Stained or or regular curly birch, it holds so well the elements and use that I am still impressed. Wood is not by anymean weak or inferior. I like the warm feeling of the wood. And the beautiful grain structures. And one more for curly birch: I got this beautiful stained handle curly birch handle that I've never protected more than with greasy hands. After 15+ years handle is still great, even I have soaked it thru most rivers, lakes and bays around here.