The Guy Harvey Box Pillow is made with Sunbrella Marine Grade Canvas and beautifully embroidered with Madiera chlorine resistant threads. All weatherproof construction, Marine grade zippers, GORE-TEX threads, UV, Mold and Mildew resistant. The world's largest selling outdoor fabric, with the ability to repel (beads) water, resists soil, both water and oil based stains. A great accessory piece to add to any furniture grouping, 17 1/2” x 17 1/2” Square Pillow. Special outdoor furniture deserves special pillows and we recommend this one. Use these Guy Harvey pillows as an accent to liven up your outdoor or indoor decor. It really is functional artwork. Excellent decor for Boats, RVs, Patio, and Indoor Furniture.