Rainforest Waterproof Backpack

  OPST Rainforest Backpack Built for Anglers Who Pack Like They Mean It Need more space than your hip or sling pack can offer — but still want something river-ready and purpose-built? Look no further than the OPST Rainforest Backpack — a modular, highly water-resistant daypack designed to handle everything from multi-hour hikes to boat-based missions. With over twice the capacity of our original Rainforest Waist Pack, this rolltop backpack is the answer for anglers who carry a little more — whether it’s lunch, rain gear, extra layers, or water bottles, plus all the essential fly gear you never leave behind. Key Features Rolltop DesignAdjusts to your loadout while keeping gear secure and moisture out. 20L Storage CapacityRoomy enough for a full-day kit without feeling bulky or overbuilt. Modular CompatibilityPairs seamlessly with the OPST Rainforest Waist Pack for extended storage and on-the-water organization. Water-Resistant ConstructionBuilt from the same durable, highly water-resist