Sweat-Proof Underwear

Sweat-proof underwear is built for bodies that move, sweat, and flow. Unlike regular underwear that traps moisture, Saalt's moisture-wicking underwear features our patented leakproof gusset technology that pulls sweat away from skin, holds it in an absorbent core, and blocks it from leaking through. Our breathable fabrics and flexible designs support your natural cycle while keeping you dry. For sweat resistance plus reliable absorbency, explore our period underwear collection.

Sweat-proof underwear is for anyone who's ever felt sticky, damp, or uncomfortable throughout the day. Whether it's heat, hormones, or movement, Saalt's moisture-wicking underwear fills that gap. Our breathable workout underwear in the No Show Seamless collection is ideal for physical activity—stretch, comfort, and protection without panty lines. For lounging or cozy days, our Comfort collection is your pick.

Our patented leakproof gusset is the thinnest and driest on the reusable market, featuring a triple-layer design that wicks sweat away, locks it in a breathable absorbent layer, and blocks it from your clothes. We never treat our fabrics with PFAS and do not use any PFAS in our finishes or manufacturing.

Unlike other brands, Saalt develops all products in-house. Every pair of sweat-proof underwear meets our strict standards for function, comfort, and ethical sourcing.

Our Seamless (No Show) collection is the best choice for movement-heavy days. This breathable workout underwear has a featherlight, second-skin feel that flexes with your body and stays virtually invisible under clothing. For elevated elegance with sweat and light flow protection, the lace period underwear collection offers breathable beauty with all the functionality of Saalt's patented gusset.

Our patented gusset absorbs light to heaviest flow while remaining slim and dry to the touch—no bulk, just support. Sweat-proof underwear eliminates the need for panty liners, managing both sweat and period flow in one layer. Our underwear comes in various absorbencies (Light to Super). It also pairs perfectly with a menstrual cup or disc as confident backup protection.

Sweat-proof doesn't mean boring. Our Lace & Mesh collection blends elegance with leak protection with graceful details, plus our patented gusset. Seamless styles deliver smooth coverage that feels invisible under clothing. Cotton gives you reliable, breathable coverage with a classic feel. Even our thongs feature the same moisture-wicking technology offering subtle protection in a minimal design for form-fitting outfits.

Saalt’s sweat-proof underwear uses a patented triple-layer gusset that actively pulls moisture away from your skin and locks it in a breathable absorbent core. The moisture-wicking fabric keeps the surface dry to the touch, even during intense workouts. It's engineered for movement: gym sessions, outdoor runs, or just a particularly humid Tuesday.

Chafing happens when moisture and friction team up. Our moisture-wicking underwear takes moisture out of the equation—drier skin means less irritation in high-friction zones. The smooth, stretchy fabrics glide instead of grab, keeping things comfortable through long days and active ones.

Your skin deserves better than a rash. Give it Saalt’s sweat-proof underwear!

Yes, and it's kind of the whole point with Saalt. Our sweat-proof underwear features built-in absorbency that handles period flow and sweat simultaneously. Whether you're dealing with a heavy workout on day two or just summer heat during your cycle, one pair does it all.

VARIATION 1: Sweat-proof underwear is specifically optimized for moisture wicking, pulling sweat away from the skin during activity or heat. Regular period underwear focuses on absorbing flow. Saalt styles do both, but styles tagged "sweat-proof" feature fabrics especially suited for workouts and warm weather. It’s ideal for gym days, travel, summer heat, or anyone who just wants to feel drier, longer.