Protects you from the sun all day long Woven Sail Shades are the most effective sail shades for offering maximum UV protection. The ultra-tight weave of the fabric has been independently tested to UPF50+ making these sail shades near impenetrable by sunlight. More than 98% of harmful UV rays are blocked out as a result. In warmer climates, sail shades are designed with small holes in the weave to allow hot air to escape and to keep it from getting too warm underneath the sail. However, with the British climate generally cooler than many countries and more prone to showers, a tighter weave is ideal. You can enjoy maximum UV protection and shelter from the rain without worrying about being uncomfortably warm beneath your sail shade. GSM stands for Grams per Square Metre, and measures the weight of the fabric to give an indication of its thickness. The higher the GSM, the thicker the fabric. UPF stands for Ultraviolet Protective Factor, it measures how much of the suns harmful rays are blocked out. This product has a novel weave structure and denier (related to thread count per inch), which produces sun protective properties. Colour: Ivory Material: High density polyester (250gsm) Waterproof: Yes UV protection: 98% Stainless steel corner plate - for easy installation Reinforced stitched corner straps Fire resistant (CPAI-84) UPF 50+ (Blocks over 98% of harmful UV rays - certified) 2 year manufacturer's warranty as standard Waterproof, ideal for unpredictable weather High density polyester (250gsm UV stabilised) Machine washable at 40 degrees Celsius The whole length of each side is strapped for tension Grade 304 stainless steel installation plate at each corner Reinforced stitched corner straps Rot proof, easy to clean