Durability and style-that’s Integrity from Marvin. Featuring the strength and beauty of Marvin Essentials pultruded fiberglass construction, Integrity fiberglass windows come in full line of popular styles. All Ultrex windows look incredible and their 100% fiberglass construction outperforms and outlasts vinyl, aluminum and composite materials. Marvin Elevate windows combine an authentic wood interior with a virtually indestructible fiberglass exterior. There is no doubt Integrity windows are Built to Perform®.
http://www.Marvin.com/Integrity