<i>&quot;Cotton is just a lousy fiber. On the other hand, wool is a strong and resilient fiber. It also never needs to be washed provided it isn&#x27;t stained.&quot;</i><p>You&#x27;re mixing things up. Cotton is <i>stronger</i> than wool, cotton shirts last many years longer than wool shirts. It&#x27;s less noticeable with sweaters simply because their fabric is thicker.<p>On the other hand, wool can be more <i>comfortable</i> to wear because it retains more heat and absorbs moisture better.