Yes. SENKOKU earplugs provide targeted acoustic dampening that significantly mutes low-frequency disruptions like snoring, traffic rumble, and noisy neighbors down to a peaceful background level. Critical higher-frequency sounds close to you - such as your phone’s morning alarm or an emergency siren - remain audible so you never risk oversleeping.

No. The low-profile double-ring core is engineered to sit flush within the natural contour of your ear rather than protruding. Made from ultra-soft, flexible eco-silica gel, they eliminate pressure points against your pillow, preventing ear canal soreness while staying securely anchored all night long.

Absolutely. They are crafted from 100% biocompatible, medical-grade eco-silica gel that is naturally hypoallergenic and free of BPA, latex, and phthalates. The non-porous finish prevents moisture and bacteria buildup, making them safe for nightly wear without itching, redness, or canal irritation.

Because the materials are fully washable and water-resistant, daily care takes seconds. Simply rinse them under warm water with a mild soap, wipe them dry with a clean cloth, and let them air dry before placing them back into their protective travel case.

Each pair comes with interchangeable silicone ear tips in multiple sizes (Small, Medium, Large) so you can find an airtight, comfortable seal tailored to your specific ear canal.

The Bluetooth model is designed with slim, integrated speakers and a low-profile fit to reduce bulk around your ears. Soft cushioning helps keep the mask comfortable against your pillow, even when sleeping on your side.

SENKOKU features deep 3D eye chambers that create space between the fabric and your eyelids and lashes. This allows you to blink naturally without the mask resting directly on your eyes, making it a comfortable option for many people with eyelash extensions.

Yes. Unlike basic flat sleep masks, SENKOKU uses a contoured nose bridge designed to reduce light leakage around the nose and edges. Combined with the adjustable strap, it helps create a dark, comfortable environment for rest, even during daylight hours.

SENKOKU uses breathable, perforated memory foam designed to encourage airflow and reduce heat buildup. Its soft cushioning provides a comfortable fit without the heavy, enclosed feeling of traditional foam masks.

SENKOKU is designed for uninterrupted rest, without loud voice prompts or disruptive battery notifications. If the battery runs out while you're sleeping, audio playback simply stops, allowing you to continue resting undisturbed.

Both versions are designed to block unwanted light and provide a comfortable, pressure-free fit around your eyes. The Bluetooth model also includes integrated speakers, allowing you to listen to music, white noise, podcasts, or calming sounds without wearing traditional headphones.

The Bluetooth model offers up to 24 hours of continuous playback on a single charge, depending on usage and volume. Recharge it using the included USB-C charging cable.

Yes. On the Bluetooth model, carefully remove the electronic components before cleaning. Hand-wash the fabric mask with mild soap and lukewarm water, then allow it to air-dry completely before reassembling. Never submerge the electronics in water.

SENKOKU features a soft, adjustable strap designed to stay securely in place without unnecessary pulling or snagging. Its low-profile fastening system helps minimize pressure against the back of your head, even when lying down.

We accept returns within 30 days of delivery. To qualify for a full refund, the earplugs, all included accessories (such as ear tips and travel case), and the original packaging must be returned in good, undamaged condition. Once received and inspected at our warehouse, your refund will be credited directly back to your original payment method.

We want you to feel confident trying SENKOKU. That's why your purchase comes with a 30-night trial. Experience the mask in your own bedtime routine, and if it isn't the right fit, you can request a return within 30 nights in accordance with our return policy.