Women's StreamWool long johns in merino wool. The high waist, elastane waistband and reversible material make these trousers unique.   StreamWool is Aclima's newest fiber, which is used to make, among other things, reversible products. The fiber gets its name from the wavy shape of the fiber on one side, while the other side is a smooth, soft knit. The combination of knits creates wavy, insulating air passages in the fabric. StreamWool is one of Aclima's warmest materials. Non-chafing seams Total Easy Care treatment prevents itching and minimizes shrinkage Weight 326 g (size S) Material 99% merino wool, 1% elastane Fabric weight: 400 g /m² (19.5 microns)