Fasten this back rest on your kayak to give your back a break on long paddling trips. The back rest is easily installed just by clipping into your kayak's attachment points, and once installed in place, adjust the strap for personal fit. A great comfort enhancer for long-term use. Features: Lightweight, shock absorbent and comfortable. Contoured massage points add muscle relief. Easy to install with durable nylon clips. Four back and side webbing straps with snap hooks to optimize personal fit. Provide lower back with great support and comfort. Compatible with almost every kayak. Specifications: Material: EVA + Oxford cloth Thickness: 13mm / 0.51in Size: 24 * 53cm / 9.5 * 20.9in (H * W) Package weight: 268g / 9.4oz Package List: 1 * Kayak Back Rest Notes: 1, Please allow 1-2cm (0.4-0.8") differences due to manual measurement, thanks.