THINX Period Underwear – Comfort-Stretch Hi-Waist, All-Day Absorbency, Leakproof & Reusable (Slate, S)

THINX Comfort-Stretch Hi-Waist Period Underwear

Designed to blend everyday comfort with dependable protection, THINX period underwear offers a sleek silhouette with lace and mesh accents in a silky-smooth fabric. It’s built to move with you through your day, from morning routines to after-work plans, without feeling bulky or restrictive.

All-Day Absorbency That Fits Your Day

The built-in core is designed for high capacity, capable of holding up to the equivalent of 12 regular tampons’ worth of flow. The same core can manage up to the flow of 3 regular pads, giving you a reliable option when you need extended coverage. This isn’t about restricting you to a single moment; it’s about offering consistency as your day evolves, whether you’re at work, running errands, or enjoying time with friends.

• All-day absorbency: up to the equivalent of 12 regular tampons.
• Core capacity supports up to 3 regular pads’ flow.
• LeakSafe barrier aims to provide reliable protection for up to 12 hours.

Leakproof Confidence Without Compromise

With a built-in leak guard, these period panties stand up to unexpected spills and longer days. They can serve as a full replacement for disposable products or as a trusted backup alongside tampons or menstrual cups. The design prioritizes a secure feel while staying lightweight and comfortable.

• Leakproof for up to 12 hours, giving you flexible daily coverage.
• Can function as a full replacement or as a backup to other products.

Comfort, Quality, and a Thoughtful Approach

The fabric blends stretch and softness to mimic regular underwear while offering built-in protection. The design avoids PFAS and is eligible for FSA/HSA purchases, aligning practical needs with a sustainability-minded approach. Since 2013, THINX has pursued inclusive, comfortable solutions for periods and leaks, inviting conversations and community around safer, more responsible care.

• Soft, flexible fabric that moves with you.
• PFAS-free and FSA/HSA eligible for select purchases.

Whether you’re new to period underwear or seeking a dependable everyday option, THINX aims to provide a practical, reusable solution that fits your life. This product line reflects a commitment to comfort, sustainability, and inclusive design, offering possibilities rather than guarantees for every day.

Care and Sustainability

Reusable by design, THINX products help reduce disposable waste while delivering dependable protection. The line emphasizes longevity and easy care, so you can incorporate them into a regular wash routine and expect continued performance over time.

Designed to be comfortable, durable, and easy to wear, THINX period underwear presents a practical option for managing menstruation with less disposable dependence.