Billabong Men's D Bah Airlite Elastane,Polyester Imported Stability -The waistband and upper third of the Airlite fabric is designed with a tight weave 4-way stretch fabric to hug the waist, giving you the stability and support where you need it most., Flexibility -The mid-section of the Airlite fabric utilizes a twill weave offering omni-directional stretch allowing optimal mobility., Comfort -The lower portion of the Airlite fabric is made up of a jacquard micro perforation. This section has been engineered to offer maximum stretch