Design and Performance. The Essential Collection's (previously known as Integrity All Ultrex) clean lines and versatile styles make it easy to meet any design style. Strong, durable fiberglass exteriors and interiors are both striking and visually maintenance free.

Proven Strength. The facts speak for themselves. Marvin's proprietary fiberglass is 8x stronger than vinyl and 3x stronger than vinyl/wood composites. It resists fading, chalking, peeling and cracking.

Powerful Durability. Marvin is the leader in fiberglass, which outlasts vinyl windows by 38%. The pultruded fiberglass remains stable in extreme temperatures and expands at nearly the same rate as glass, so Essential windows stay strong and perform well, long into the future.

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Marvin's Elevate Collection

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