3-Stage efficiency filtration - Joypur collapsible water bottle has a filtration accuracy of 0.01µm and removes 99.9999% of microscopic substances,cysts,particles and sediments.consists of 3 layers of filtration material:ultrafiltration membrane,PP cotton and carbon fiber.NSF Certified,FDA Food-Grade Materials,BPA Free.It also eliminates odors and improves the taste of water. Long Lifespan - this water filter has a long lifespan of 5000 liters(1320 gallons) ,built to last for years of daily hikes, multi-week expeditions, or even daily use at home. Flow rate:600ml/min （Notes：upgraded carbon filtration design may cause slight squeezing difficulty. designed for superior precision and water purity.）reliable, effortless hydration that lasts as long as your adventures do.you can simply backwashing the filter with clean water to remove sediment and restore flow rate. Featherlight & packable design - Large Capicity-32oz(1000ml) Weighing-0.23lb（105g） next to nothing, this collapsible soft flask rolls down to the size of a fist when empty, freeing up valuable space in your backpack or hip pocket; The rugged yet flexible material allows you to carry it everywhere, ensuring you have access to safe drinking water whether you are deep in the backcountry or navigating a city with questionable tap water 100% Leak-proof guarantee: Built for the long haul, our upgraded food-grade thickened TPU padded material is designed to be sturdy and abrasion-resistant, addressing common durability issues found in competitors; Whether you are traversing the Appalachian Trail or traveling overseas, trust a water filter that survives the elements and keeps you safe from waterborne threats. Hassle-free customer service-we offer 30 days return and exchange without reason,3 months warranty and 24 hours online customer service.Every joypur filtered water bottle is carefully inspected before delivery in the hope of bringing you the best!We also have standard thread replacement filters available on Amazon (ASIN: B0DK3RKNXX). Brand:Joypur Product name:Foldable water filter,foldable water filter bag, foldable filter water bottle,filter water bottle. Product material:PP cotton + carbon fiber + ultrafiltration membrane. Product size:650ml foldable filter water bottle 3.94 inches * 2.36 inches * 9.84 inches;1000ml foldable filter water bottle 4.33 inches * 2.36 inches * 12.60 inches;2L foldable filter water bottle 6.69 inches * 2.36 inches * 15.75 inches. Product weight:650ml foldable filter water bottle 100g;1000ml foldable filter water bottle 120g;2L foldable filter water bottle 200g. Product life:650ml/1000ml foldable filter water bottle 5000 liters;2L foldable filter water bag 20,00 liters. Product packaging size:650ml/1000ml foldable filter water bottle 4.33 inches * 2.56 inches * 4.72 inches;2L foldable filter water bag 2.76 inches *2.76 inches * 6.77 inches Product packaging:neutral box. Product flow rate:650ml/1000ml foldable filter water bottle 600 ml/min;2000ml foldable filter water bottle 1800ml/min. Product usage scenarios:suitable for hiking,camping,outdoor activities,hiking,anglers,backpackers,emergency survival water filter,easy to carry and light weight. Product after-sales service:Joypur is committed to providing consumers with satisfactory services,safe water use,and reliable water use;improving the quality of life of consumers;if you have any questions,please contact us in time,thank you.