Stretching stiffness of the cloth.

Must be greater than zero and smaller or equal to one.
In many cases, when you want a cloth to be more stiff, actually reducing the number of vertices will get you better results - and performance.

	// Set the stretching Stiffness to 1 regardless if the cloth
	// is a Skinned Cloth or Interactive.
	transform.GetComponent(Cloth).stretchingStiffness = 1;

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        transform.GetComponent<Cloth>().stretchingStiffness = 1;
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		transform.GetComponent[of Cloth]().stretchingStiffness = 1