It is mainly tormentil that the Lapps use to dye their wool red, and they use alder bark to dye their hides. Lapp trousers reach down to the feet and are tied around the outside of the boots, thus preventing the entry of water. Their feet are bare inside the boot. They do not button up their trousers as the waistband has a loose piece of thin cord attached which they pull in according to their girth and tie in a knot on the outside. There is no opening in front of the penis; instead, they push and pull their trousers up and down over their thighs without any hindrance from the shirt. When a Lapp pisses, he pushes the waistband down at the front and passes water in this way.