10 ribs. Super solid and high-quality workmanship. The compact TechRise umbrella is equipped with 10 flexible, resin-reinforced fiberglass ribs and high-quality galvanized steel shafts, which are strong and flexible enough to withstand strong winds without twisting outward. Large and lightweight umbrella. The pop-up umbrella opens to a diameter of 104 cm and is able to fully protect two people from the rain. When folded, the umbrella measures only 31 cm. Portable and lightweight (0.5 kg) umbrella. Easy to put in your school bag, purse, briefcase, backpack, or luggage. Ideal for men and women. Automatic opening and closing. The automatic opening and closing function allows for easy one-handed operation. Simply press the button once to open or close the umbrella in one second. This design makes using the umbrella more efficient and convenient and won't cause any trouble on rainy days. Waterproof and quick-drying. The TechRise travel umbrella protects you in heavy downpours with a high-quality canopy made of high-density impact-resistant fabric and a waterproof coating, making your folding umbrella highly waterproof and quick-drying. Comes with an umbrella cover to keep your bags dry. 3-year warranty. We offer a 36-month warranty from the date of purchase for the large windproof umbrella. If you have any questions about using the folding umbrella, please do not hesitate to contact us via customer service.