Sawyer 20% Picaridin Insect Repellent Review

Overview

Sawyer’s 20% Picaridin Insect Repellent is a DEET-free, fragrance-free skin repellent sold as a 4 oz lotion and a 4 oz pump spray. It has become a default bug-protection pick for three-season hikers and thru-hikers who are tired of DEET’s chemical smell and its habit of attacking plastics. The trade-off is the stock packaging: at 136–145 g, a full bottle is more repellent than most trips require.

Key Specs

Spec	Detail
Active ingredient	20% picaridin
Formats	Lotion; pump spray
Volume	4 fl oz (118 mL)
Weight	136.1–145 g, depending on format
Mosquito and tick protection	Up to 14 hours (lotion); up to 12 hours (spray)
Biting flies, gnats, chiggers, sand flies	Up to 8 hours (both)
DEET-free	Yes
Fragrance-free	Yes
Safe for	Children 6 months and older; use during pregnancy
Shipping	Contiguous US only; cannot be shipped by air

Performance

Efficacy

Mosquito protection is where this repellent built its reputation. Hikers on multi-day trips in the Central Cascades describe sitting in camp while mosquitoes hovered nearby and never landed. Sawyer’s own claim is that picaridin outperforms DEET against biting flies, and the label lists stable flies, black flies, gnats, chiggers and sand flies among its targets. Results there are less consistent. At least one REI reviewer reported that it “doesn’t do a darn thing for black flies,” and early-season northern black fly country tends to humble every repellent on the market.

The product also has institutional backing. Wirecutter and The New York Times rated it a top bug repellent in May 2020, and Sawyer lists a recommendation from the Public Health Agency of Canada.

Duration

The two formats differ here. The lotion is rated for up to 14 hours against mosquitoes and ticks, the spray for up to 12. Sawyer attributes the gap to the lotion slowing evaporation of the active ingredient. Both formats carry an 8-hour rating against biting flies, gnats and chiggers. Heavy sweat shortens those windows, and hikers who are working hard usually reapply after lunch, as they would with DEET.

Skin Feel and Odor

Comfort is where picaridin beats DEET for everyday wear. Consumer Reports described the lotion as leaving no aroma and no residual skin feel after application. Owners who switched say it avoids the greasy, slimy coating common to other repellent lotions. It is a fairly thick lotion, less messy than DEET products, and a little goes a long way: one hiker reported using about a third of an ounce over three days.

The caveat is that hands can stay tacky until the lotion dries fully, which is a nuisance when cinching hipbelt straps or handling a stove. Applying it a few minutes before gearing up solves it. The spray skips the tackiness but requires more care around the face and in wind.

Gear Safety

Unlike DEET, which acts as a plastic solvent, picaridin leaves trekking pole grips, pack buckles, watch crystals, sunglasses, fishing line and phone screens alone. For anyone who fly fishes between camps, that matters.

The protection is not unconditional. In Consumer Reports’ lab testing, the product stained or damaged vinyl (PVC), leather, polyurethane, painted metal, nail polish, a 90% polyester/10% spandex fabric and 100% cotton. Keep it off leather accessories and cotton base layers.

Pairing With Permethrin

Sawyer recommends pairing the repellent with its permethrin spray for clothing and gear. This is the two-layer system most experienced backpackers use in serious bug country: permethrin on fabric, picaridin on exposed skin. Hikers who ran both on weekend trips report finding no ticks on them afterward.

Repackaging

A full 4 oz bottle is a meaningful chunk of a toiletry kit. Ultralight hikers commonly decant about half an ounce of lotion into an empty hand sanitizer bottle, a 0.5 oz Visine bottle or a small balm jar, which covers a season of weekend trips. Several owners also report that the stock bottle can leak when it rides on its side in a pack, which is another reason to decant.

Choosing a Version

The formulation is the same 20% picaridin in both versions, so the choice comes down to format.

Standard lotion (136.1 g). This version has the longer mosquito and tick rating, 14 hours against 12 for the spray, and it is easier to repackage into tiny bottles. It also suits hikers who want to apply it precisely to ears, neck and wrists without overspray. It suits long days, multi-day tick exposure and anyone planning to decant. The cost is the sticky-hands stage.

4 oz pump spray (145 g). The spray is about 9 g heavier and covers large areas of skin faster, and it leaves nothing on the hands. It is the better pick for car camping, group trips and families who want fast coverage on kids. On a backpacking trip, it is the harder format to decant, and it carries a shorter mosquito and tick rating. Both formats share the 8-hour rating against biting flies.

For most backpackers, the lotion is the better choice.

Pros & Cons

Pros

• Up to 14 hours of mosquito and tick protection from the lotion, 12 from the spray
• No DEET, no fragrance and no strong odor
• Safe on most plastics and synthetics, including trekking poles, watches, sunglasses and fishing line
• Safe for children 6 months and older and during pregnancy
• Easy to decant into smaller containers
• Works well in combination with permethrin-treated clothing

Cons

• The full 4 oz bottle is heavy for what most trips use
• Lotion leaves hands tacky until it dries
• Mixed reports on black flies
• Consumer Reports found staining on cotton, leather, vinyl and some synthetic blends
• Some owners report leaks when the bottle is stored on its side
• Cannot be shipped by air or outside the contiguous US

Who Should Buy This

Three-season backpackers and thru-hikers who want proven bug protection without DEET’s odor and gear damage should buy the lotion. It is a particularly good fit for anglers, hikers with plastic-heavy kits and families, since it is cleared for use during pregnancy and on children as young as six months. Anyone heading into the Boundary Waters, the early-season High Sierra or the mid-Atlantic in tick season should pair it with permethrin-treated clothing. Hikers whose main enemy is early-season black flies should expect mixed results from any repellent, this one included. Anyone who won’t decant the bottle will carry unnecessary weight.

Verdict

Sawyer’s 20% picaridin is the repellent most backpackers can adopt and stop thinking about: it works, it feels like almost nothing on skin, and it leaves gear intact. Choose the lotion for its longer protection window and easy repackaging, and the spray only when speed of application matters more than ounces. Decant before the trailhead and the weight penalty largely disappears.