An ultra-lightweight solution for backcountry water storage, the HydraPak Seeker 4L is a highly durable, collapsible container. It weighs just 3.4 ounces, carries up to 140 fluid ounces of water, and can be frozen for use as an ice-pack or filled with hot water to warm you up in frigid conditions! The BPA-free and PVC-free container is constructed of highly-durable abrasion-resistant TPU with RF-welded seams for bolstered durability. It has two load-bearing welded lash points that allow you to attach it to a pack or hang it at your campsite. Its in-use dimensions are 16.5' x 5.9'. When not in use, it can be rolled up for compact storage. The wide 42mm screw cap enables the Seeker to fill conveniently, makes for easy pouring, and allows compatibility for filter adapters and other accessories (all sold separately). The Seeker 4L is even backed by HydraPak's incredible Beyond Lifetime Guarantee.