Sawyer 20% Picaridin Insect Repellent Lotion Review

Overview

The Sawyer 20% Picaridin Insect Repellent Lotion is a DEET-free skin repellent built around picaridin — a synthetic compound derived from piperine in pepper plants — that has become the go-to bug protection for a wide swath of backpackers who are tired of DEET eating their gear. It provides effective protection from disease-spreading ticks (Lyme disease, tick-borne encephalitis) and mosquitoes (West Nile, Dengue, and Zika viruses). It’s a solid choice for three-season hikers, thru-hikers, and anyone who wants serious protection without worrying about what the repellent is doing to their trekking pole grips or fly line.

Key Specs

Spec	Detail
Active Ingredient	20% Picaridin
Format	Lotion
Net Weight (full bottle)	136.1 g (4.8 oz)
Volume	4 fl oz (118 mL)
Mosquito & Tick Protection	Up to 14 hours
Biting Fly, Gnat & Chigger Protection	Up to 8 hours
DEET-Free	Yes
Fragrance-Free	Yes
Gear-Safe	Yes — won’t damage plastics or synthetics
Safe For	Children 6 months and older, use during pregnancy
Comparison	See how Sawyer Picaridin Lotion compares to similar gear

Performance

Efficacy

This is where the Sawyer Picaridin lotion earns its reputation. Users on multi-day trips into the Central Cascades report its mosquito-repelling ability as “amazing,” describing sitting outside watching two dozen mosquitoes hovering nearby without a single bite. Picaridin has proven effective against mosquitoes in nearly all field situations, with users reporting mosquitoes hovering around them but not even landing while wearing this product.

On biting flies — a category where DEET often falls short — Sawyer claims it’s more effective at repelling biting flies than DEET, and is also effective against stable flies, black flies, gnats, chiggers, and sand flies. That said, at least one REI reviewer noted that it “doesn’t do a darn thing for black flies.” Results in heavy black fly country can be variable regardless of what you’re using, so temper expectations in early-season Northern terrain.

Duration

Because of the way lotions slow the evaporation of the active ingredient, lotions last approximately 2 hours longer than sprays of comparable concentrations

— which is why the lotion clocks up to 14 hours against mosquitoes and ticks versus 12 hours for the Sawyer spray version. Heavy sweat will shorten that window.

Users working hard and sweating a lot typically find they need to reapply after lunch, which is also true of DEET and other products.

Skin Feel & Odor

This is where picaridin genuinely wins over DEET for everyday comfort. Consumer Reports describes the lotion as having “no aroma or residual skinfeel upon application.” Multiple users report that since first using Sawyer Picaridin lotion, they haven’t turned back — finding it very effective without the sticky or slimy feeling common to other lotions. Field reports describe it as a relatively thick lotion that’s less messy than DEET, with no noticeable odor, no initial oily feeling on skin, and good staying power — one user used about 1/3 oz over three days.

One honest note: the lotion version can make your hands sticky until it’s completely dry, which is mildly annoying when you’re trying to cinch hipbelt straps. Apply it a few minutes before gearing up.

Gear Safety

Both the spray and lotion dry quickly and won’t damage plastics or synthetic coatings — safe for use on clothing, backpacks, watches, sunglasses, fishing line, firearm finishes, and more.

This is a big deal.

DEET can damage tough plastic handles on soil augers, make GPS OtterBox screens illegible, and leave spots on the bumpers and paint of field vehicles

— none of which you want near your trekking poles, phone, or pack buckles. Picaridin sidesteps all of that.

Worth noting: Consumer Reports testing found this product did stain or damage vinyl (PVC), leather, polyurethane, painted metal, nail polish, 90% polyester/10% spandex, and 100% cotton in lab conditions. So “gear-safe” isn’t unconditional — watch out for cotton base layers and leather accessories.

Pairing with Permethrin

Sawyer recommends maximizing protection by pairing with Sawyer Permethrin tick and insect repellent spray for clothing and gear.

This two-layer system — Permethrin on clothing, Picaridin on exposed skin — is the approach most experienced backpackers settle on for high-bug environments.

Users pairing the two products on multi-day trips report not finding a single tick or bug on them the entire weekend.

UL Repackaging

The 4 oz bottle at 136.1 g full is a meaningful chunk of pack weight for a toiletry item. The UL-minded move: decant half an ounce into an empty hand sanitizer bottle — that’s more than enough for an entire hiking season. Hikers on forums have also reported success transferring lotion into 0.5 oz Visine bottles and small balm jars with no issues.

Pros & Cons

Pros

• Highly effective against mosquitoes and ticks — up to 14 hours per application
• Genuinely more effective against biting flies than DEET, per Sawyer
• Gear-safe on most synthetics, plastics, and nylon
• No strong odor; pleasant to wear on skin all day
• Non-greasy, absorbs quickly
• Safe for children 6 months and older, and during pregnancy
• Easily repackaged into smaller containers for ultralight carry
• Pairs well with permethrin-treated clothing for a belt-and-suspenders defense

Cons

• Full 4 oz bottle is heavy — commit to repackaging if weight matters
• Makes hands temporarily sticky until fully absorbed
• Efficacy against black flies specifically is mixed in user reports
• Consumer Reports testing found staining on several materials including cotton and some synthetic blends
• Some users report bottle design can leak when stored on its side in a pack
• Cannot be shipped by air (mainland US only)

Who Should Buy This

This is the right choice for three-season backpackers who want serious, proven bug protection without DEET’s drawbacks — particularly anyone who fishes alongside hiking (picaridin won’t destroy fly line or leaders), carries gear with plastic components, or is simply tired of smelling like a hardware store. It’s safe for the whole crew, including during pregnancy and on children as young as six months, which makes it a practical pick for family trips too. If you’re heading into legendary bug country — the Boundary Waters, early-season High Sierra, or anywhere in the mid-Atlantic during tick season — pair this lotion with permethrin-treated clothing and you’ll have a genuinely robust system.

Verdict

The Sawyer 20% Picaridin Lotion has cemented itself as the default insect repellent recommendation across the backpacking community for good reason: it works, it’s comfortable to wear, and it doesn’t destroy your gear. The lotion format edges out the spray for longevity on skin, and repackaging into a small dropper bottle brings the weight penalty down to almost nothing. The one real friction point is the stock 4 oz bottle — it’s bulkier than you need for most trips and has some reported leaking issues when stored on its side. Repackage before you leave the trailhead and that problem disappears. Rating: 8.5/10.