Seat & Backrest Dimensions: Seat dimensions 55"x22"x5.1", backrest dimensions 21"x22"x5.1". The tufted detailing elevates this cushion's design aesthetic, while strategically compartmentalized cotton padding ensures even weight distribution for superior seating comfort Cushion Details: The TPU water-resistance coating provides this seat cushion with exceptional water-resistance performance. The combination of PP cotton and crumb foam filling offers a medium-firm feel, while quadruple straps keep the cushion securely in place Solution-Dyed Fabric: This cushion cover is made of high-end polyester, dye are locked into the polymer chains during fiber formation, thus exhibiting very high color fastness. This structure makes the cover resistant to fading or color change under conditions of 1000 hours light exposure All-Environment Versatility: This lounge pad is designed for indoor-outdoor. The weather-defying makes it particularly recommended for outdoor use – where wether-resistant fabrics truly shine through seasonal changes Critical Measurement Guidance: Carefully measure your lounge's exact dimensions to ensure proper fit. Our cushion sizes are calculated using seam-to-seam specifications. To guarantee optimal placement, allow 5/8"-1" clearance margins around your lounge perimeter when positioning the cushion