Waterproof fly box performance comes down to two things: does it keep your flies dry, and can you find the right fly fast when a hatch is on.
Most fly boxes solve one of these. The Rivfly waterproof fly box solves both — a full silicone gasket seal that survives submersion, and a grey silicone insert that creates enough contrast against your flies to make selection fast under any light condition.
Why the Grey Silicone Insert Changes Everything
Standard foam inserts are black or dark grey. Most fly fishing box interiors match the color of the flies stored in them — earth tones, olives, browns — which means scanning a full box under low morning light or bright midday sun requires pulling flies out to identify them. That costs time during a hatch.
The Rivfly RV-FB-SL-GRY-013 uses a grey triangle silicone insert. The lighter grey background creates visual contrast against most fly patterns — especially the dark thread wraps, hooks, and bead heads that define fly profiles at a glance. You see the fly shape immediately, not a dark mass of material on a dark background.
The triangle slot design grips hook bends at the bend curve, not the point. The hook seats firmly without being forced, removes cleanly without tearing the material, and the silicone recovers its shape after each use. Unlike foam that compresses and loses grip over time, the silicone slots maintain consistent holding strength across hundreds of insertions.
Full Waterproof Construction
The waterproof fly box seal uses an orange silicone gasket running the full perimeter of the box. When the lid closes, the gasket compresses against the body to create a watertight barrier — the same sealing principle used in dive equipment and waterproof electronics. The orange color is functional as well as visual: it lets you confirm the gasket is seated correctly before closing, and it stays visible if the gasket ever needs inspection or replacement.
The body is impact-resistant ABS plastic. The lid is clear AS — a material with better impact resistance and clarity retention than standard polycarbonate at this price point. It won’t cloud after repeated drops or exposure to UV.
Technical Specifications
| Specification | Detail |
|---|---|
| Model | RV-FB-SL-GRY-013 |
| Dimensions | 14 × 9.7 × 1.7 cm |
| Capacity | 88 flies |
| Body Material | ABS (impact & corrosion resistant) |
| Lid Material | AS (clear, shatter resistant) |
| Insert | Grey triangle silicone |
| Gasket | Orange silicone, full perimeter seal |
| Waterproof | Yes — gasket sealed |
| Configuration | Single layer / single sided |
What Fits in This Box
The triangle silicone slots accommodate dry flies, nymphs, midges, and smaller wet flies from size 8 down to size 22. The slot spacing is optimized for standard trout fly hook gaps — not oversized streamer hooks. For larger streamers and saltwater patterns, see our other fly fishing box models.
At 14 × 9.7 cm, the box fits in a standard fly vest front pocket or chest pack side pocket without bulk. The 1.7 cm profile keeps it flat enough to stack with other boxes in a bag.
In the Box
1× Rivfly Waterproof Fly Box HG013G · Grey silicone insert · Orange silicone gasket seal · 88-fly capacity
Store your flies with Rivfly fly fishing flies — matched for the same water, same hatches, same standards.
New to fly storage systems? Trout Unlimited covers fly fishing gear fundamentals for freshwater anglers.
Very secure hook grip. I was worried the triangle silicone slots wouldn’t hold my tiny size 22 nymphs tightly, but they haven’t budged a millimeter even after shaking the box around. It holds just as tight as premium $30 boxes but at a fraction of the price.
I am so done with cheap foam fly boxes that tear up and lose their grip after a single season. This Rivfly box uses a tough silicone insert with triangular slots that hold the hooks perfectly without shredding. I’ve pulled flies in and out of the same slots dozens of times and the silicone still looks brand new.
I fish a lot of saltwater flats for sea-run trout and salt air ruins metal hinges fast. This box is 100% plastic and silicone, so there’s nothing to rust or corrode. Sized perfectly for a day’s worth of bonefish and permit patterns, and fits easily into a minimalist chest pack.
The high-contrast grey background inside is a brilliant design. Most of my other boxes have dark green or black inserts, making it impossible to find a black midge or dark nymph in low evening light. The grey triangle slots make every single fly stand out instantly. No more squinting on the river.
Perfect size for active wading. It is super slim at under 2cm thick, meaning it slides right into my shirt or vest pocket without adding bulk. Even though it’s compact, the 88 slots are spaced perfectly so my dry flies don’t get their hackles crushed when the lid shuts.