Fit for Dining Chairs:20" x 20" x 3.1" cushion fits most dining chairs, kitchen chairs, desk chairs, and accent chairs. Please measure your seating area to ensure proper fit. 300GSM Outdoor Fabric: Made from 300GSM polyester with recycled material, designed for UV resistance, anti-aging durability, long-lasting color, and light stain resistance;3-Year fabric limited warranty Premium C0 Water-Resistant Fabric: Breathable, tear-resistant polyester with PFAS-free C0 DWR finish beads off light rain and stains 30D High-Resilience Foam:solid core resists sagging, bounces back fast, and maintains loft through daily use—no flattening over time Note:Vacuum-compressed for safe shipping—temporary wrinkles or soft bends will disappear. Unpack, air out 24–48 hours, or speed up with a cool hair dryer (6–8" away)