Cap Sweat Liner — Single-Layer Hat Insert

Name: Cap Sweat Liner — Single-Layer Hat Insert
Brand: SweatHawg
SKU: Cap Insert - Charcoal
Price: 20.0 USD
Availability: InStock

Turn most hats into a no-drip zone. The Cap Insert keeps sweat out of your eyes, off your glasses, and protects your favorite hats from stains.

Discover more sweat-control gear in our Cap Sweat Liner Collection.

$20.00

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Color Charcoal Ash White

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Product Details

The Cap Insert transforms your favorite hats into powerful sweat-stoppers. Using SweatHawg’s tech-fabric system, it gulps sweat before it drips, then wicks and evaporates it for lasting cooling comfort. Slim, lightweight, and nearly invisible once in place, it protects your hats from stains while keeping your eyes clear and your focus sharp—on the trail, on the course, or on the job.

Benefits

TECH-FABRIC SYSTEM (ABSORB + WICK) — Hyper-absorbent rayon (from bamboo) core gulps sweat, while the outer mesh wicks and evaporates fast.

STOPS DRIPS & STINGING EYES — Blocks sweat before it hits your face or glasses.

PROTECTS YOUR HATS — Prevents sweat stains and salt rings in caps, visors, runner hats, bucket/boonie hats, and more.

LOW-PROFILE FIT — Slides behind most hat sweatbands without changing the fit.

RUN-READY COMFORT — Smooth edges, no Velcro®, snaps, or glue; featherweight feel for long runs and hot days.

WASHABLE & REUSABLE — Machine wash, air dry, repeat. Built to outlast cheap foam strips.

MADE IN THE USA — Hand-sewn in Oregon with small-batch quality.

How to Use

1. Lift your hat’s internal sweatband.

2. Tuck the insert across the front brow (temple-to-temple).

3. Smooth flat → cap on → go.

Tip: Adjust curve to fit higher-crown trucker caps or low-profile runner caps.

Best For: Running (performance caps), golf, yardwork, landscaping, gardening, hiking, bucket/boonie hats for sun protection, coaching, kitchen heat, and everyday wear in heat & humidity.

Materials & Care

Fit: Designed to fit most hats with built-in sweatbands (ballcaps, runner caps, trucker hats, visors, bucket/boonie hats, cowboy hats). Not intended for hard hats or helmets.

Materials: Rayon (from bamboo) absorbent felt (interior) + technical wicking mesh (exterior).

Care: Machine wash cold, air dry. No fabric softener or bleach.

Origin: Hand-sewn in Oregon, USA.

Warranty Info

Most effective sweat managing headwear, or your money back.

View full details

Hyper-Absorbent Brow

No Risk Guarantee

Hand-Sewn USA

Absorbs Wicks Drys Cools

Real sweat control

Every SweatHawg product combines an ultra-absorbent rayon felt core with a quick-wicking bamboo-polyester shell. Real sweat control means no burning eyes, no smeared glasses–comfortable, clear focus from start to finish.

Absorbs*Wicks*Dries*Cools

Max Absorption

12x its weight in water

Quick-Wicking Shell

Wicks wet away

Machine Washable

Easy to keep clean

Made in the USA

Built tough, no shortcuts

Awesome product

Cap Insert Doesn't Stay in Place

I purchased an assortment of these products as a gift. The recipient reported to me that the CAP INSERT WILL NOT STAY IN PLACE! He followed the simple directions and set it under the inside cap flap but it moves around before he can get his cap on. When he takes the cap off, the INSERT FALLS RIGHT OUT! It's a great idea, and the fabric is absorbant, but there's no way to attach it so it stays in place. When the insert literally dropped out of his cap and fell to the floor when he briefly removed his cap, it was embarrassing, annoying and Yucky (NOT hygienic)! So, in my opinion, this is a Major Design Flaw.

Cap insert

I purchased this for my son after purchasing the headbands. The headbands worked great but he wanted a couple more. He said the cap insert did not work well for him at all. It wouldn't stay in place and didn't absorb like the headbands did. Headbands are great though!

Cap Insert

Product performs exactly as described and my amount of sweating during exertion can only be described as Extreme. Have been looking for and trying Products for some time and nothing comes close to the Performance or Quality of Sweathawg!!

PS: Please consider development in Arm Sleeves/Compression Sleeves with Bands at both ends for Throwing Sports!!

wonderful product for hot New Mexico

I got some of these last year and they work great. I ordered a few more this year for different caps. I live in Albuquerque, NM, I am at 300 lbs. and I sweat- these work great.

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All-American Craftsmanship

100% Proud - Designed and Produced in the USA

Frequently Asked Questions

How do I care for my SweatHawg?

Hand-wash or machine-wash in warm or cool water. Do not use fabric softener, as it clogs the absorbent layer. Dry on a cool setting or hang dry. Avoid wringing; instead, squeeze out excess water or roll the item in a towel. For headbands, wash them closed and ensure the hooks are secured within the loops. Exposed Velcro hooks may snag delicate fabrics.

How does SweatHawg help with sweat control?

SweatHawg uses highly absorbent, moisture-wicking materials that pull sweat away from your face and eyes. This helps maintain comfort and visibility during cycling, outdoor work, training, and other high-heat activities.

Can this be worn with helmets, hats, or other gear?

Yes. SweatHawg products are thin, flexible, and designed to work under most helmets, caps, hard hats, and other headwear. They function well as helmet liners, skull caps, and headbands.

Who usually benefits from SweatHawg products?

People who sweat during cycling, indoor training, construction, outdoor work, hiking, and other heat-intensive activities often choose SweatHawg for better sweat control and comfort.

How long does the absorbency last?

Absorbency varies by activity level, but most users experience strong sweat control before needing to rinse or refresh the fabric.

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Cap Sweat Liner — Single-Layer Hat Insert