Specially if the towel is of untoughened and silky texture.    From Wordnik.com.  [amp; Pressemeldungen kostenlos] Reference

The young Lord Berkeley, with the fresh air of freedom in his nostrils, was feeling invincibly strong for his new career; and yet -- and yet -- if the fight should prove a very hard one at first, very discouraging, very taxing on untoughened moral sinews, he might in some weak moment want to retreat.    From Wordnik.com.  [The American Claimant] Reference