During the coldest months of the year, the Qom wrapped themselves in ponchos. Adult males adorned their heads with the "opaga", a headdress made from feathers and cords made from the vase plant. Women and younger men decorated themselves with "onguaghachik": bracelets originally made using teeth and claws from animals, seeds, feathers, shells and cochleas. It appears that the Qom obtained many of these elements through a system of barter and trade with other indigenous groups. Necklaces called "colaq" were also worn and made using similar items to the "onguaghachik". Another item, known as the "nallaghachik" were eminently festive accessories that were brightly colored and made using feathers, flowers and leaves. 