Lightest water filters & treatments: 12 models measured
Every one of the water filters & treatments in the RidgeNote register with a manufacturer-published figure, placed on the distribution. 4 of 16 publish no usable weight and are listed but not ranked. 4 other products on this shelf are not water filters & treatments and are listed below, unranked. Figures are manufacturer-listed and dated on each product page; nothing here is weighed by us.
Measured guides for this shelf
- What's the Lightest Backpacking Water Filter to Buy in 2026?updated 2026-09-18
The spread
- Weight · 12 of 16 published
- 2.0 ozlightest2.6 oz25th3.0 ozmedian5.7 oz75th1.06 lbheaviest
- Price · 16 of 16 published
- $14.95cheapest$33.9525th$52.45median$99.9575th$399.95priciest
Lightest at each price
The least you can carry for what you are willing to spend — the frontier, not a favourite.
- Under $100Sawyer Micro Squeeze Water Filtration System2.0 oz · $33.95
- $100 – $200MSR AutoFlow™ XL Gravity Filter 10 L12.0 oz · $139.95
- Over $350MSR Guardian™ Purifier1.06 lb · $399.95
All 12 water filters & treatments, lightest first
| # | Model | Weight | vs median | Price | $/oz |
|---|---|---|---|---|---|
| 1 | Sawyer Micro Squeeze Water Filtration System | 2.0 oz | -33% | $33.95 | $16.89 |
| 2 | Katadyn BeFree 1L Lightweight Collapsible Water Filter Bottle | 2.2 oz | -26% | $42.95 | $19.33 |
| 3 | Platypus DayCap™ In-Bottle Filter | 2.6 oz | -13% | $49.95 | $19.14 |
| 4 | Platypus QuickDraw™ Filter - Blue | 2.9 oz | -2% | $39.95 | $13.65 |
| 5 | Hyperlite Mountain Gear Aquamira Water Treatment 1 oz. | 3.0 oz | 0% | $14.99 | $5.00 |
| 6 | Aquamira Water Treatment Drops | 3.0 oz | 0% | $29.99 | $10.00 |
| 7 | Sawyer Squeeze Water Filtration System | 3.0 oz | 0% | $45.95 | $15.33 |
| 8 | MSR TrailShot™ Pocket-Sized Water Filter | 5.0 oz | +67% | $69.95 | $13.97 |
| 9 | Platypus QuickDraw™ 2L Filter System | 5.7 oz | +89% | $79.95 | $14.08 |
| 10 | Platypus QuickDraw™ 3L Gravity Filter System | 8.2 oz | +173% | $99.95 | $12.21 |
| 11 | MSR AutoFlow™ XL Gravity Filter 10 L | 12.0 oz | +300% | $139.95 | $11.67 |
| 12 | MSR Guardian™ Purifier | 1.06 lb | +467% | $399.95 | $23.52 |
Also on this shelf, not ranked
Replacement cartridges, maintenance kits, adapters and hoses are listed, not ranked.
How this is measured
Weights and prices are the manufacturer's published figures as recorded in the RidgeNote register, each with its source and the date it was read on the product page. Percentiles count only models with a published figure; ties count neither way. Price is the verified current price where one exists, otherwise the maker's list price. The ranked list is water filters & treatments: Replacement cartridges, maintenance kits, adapters and hoses are listed, not ranked.The register is re-read on a schedule, so this page reflects the catalogue as of its last build. As an Amazon Associate, RidgeNote earns from qualifying purchases.