If Fabric weight (Oz / sq yd):< 2.5: 10 lbs Minimum2.5-4.0: 15 lbs Minimum4.1-6.0: 20 lbs Minimum (Wrinkle Resistance Fabric - 15 lbs.)>6.0: 25 lbs Minimum (Wrinkle Resistance Fabric - 20 lbs.)Lining and pocketing: 15 lbs MinimumFront closure strength: 15 lbs Minimum