Nalgene Wide Mouth Sustain 500ml Slate Blue Converts to backpack Soft-touch membrane is soft on

Soft-touch membrane is soft on your skin

RF welded Thermoplastic Polyurethane (TPU) and double hook-and-loop roll top construction keeps this soft case both watertight and slim

Troy sizes up to Large because of broad shoulders

The Ultra Adventure is updated with a slimmer silhouette and fun technical details like our Reverse Split Brim™ and Sunglass Lock™

Internal media pocket with media loop

Nalgene Wide Mouth Sustain 500ml Slate Blue Converts to backpack Soft-touch membrane is soft onA compact classic with an eco conscious edge. The Nalgene Sustain Wide Mouth 500ml bottle delivers trusted performance in a smaller, streamlined form perfect for travel, daily use, or throwing in your pack for lightweight adventures. Crafted in the USA from 50% recycled plastic (ISCC certified), this BPA BPS free bottle helps reduce landfill waste and lowers carbon emissions, without compromising on strength or durability. Designed to be leak proof,