Why are cotton and woolen clothes rough and silk, nylon and polyester smooth to touch Share with your friends Share 1 Peddi Manjunathreddy answered this due to their surface area 1 View Full Answer Neeraj answered this because cotton and wool contain air space in it ,so it feel rough to touch. -1 Mridul Suresh answered this because cotton and woolen clothes are obtained from plants and animals while nylon and polyester are made of chemicals using chemical methods 1