Basic Information

Experience the healing power of Korea’s natural hot springs — now brought into your daily routine with Onsha.

This premium shower filter is infused with 100% natural sulfur-rich thermal spring water, sourced from 808 meters deep granite bedrock known for its mineral purity and skin-soothing benefits.
Using a patented freeze-drying technology, the spring water is transformed into a high-density gel cartridge that locks in active minerals without any artificial additives or preservatives.
With each shower, Onsha delivers the essence of a true hot spring spa — helping to hydrate, calm, and improve skin elasticity even for sensitive or acne-prone skin.
Choose from the full-size model for home spa rituals or the compact mini version for convenient wellness while traveling.
Onsha turns your shower into a daily self-care ritual powered by nature’s most revitalizing elements.

Key Features

Patented 4x Sulfur-Rich Thermal Spring Water 

: Our hot spring water contains four times more natural sulfur than average, providing powerful anti-inflammatory and skin-purifying benefits.

Freeze-Dried Gel Cartridge Technology

: Our exclusive freeze-drying process turns pure spring water into a stable gel, 

preserving its minerals and efficacy without preservatives.

Clinically Proven Skin Improvement

: Backed by 6 clinical studies, our filter improves moisture, glow, elasticity, 

and helps reduce both inflammatory and non-inflammatory acne.

2-in-1 Total Purification System

: The built-in sediment + powder filter system removes rust, heavy metals, bacteria, and residual chlorine in one step.

Dermatologist-Tested & Certified Safe

: Free from harmful chemicals and certified by ISO and the World Atopy Association. 

Gentle enough for sensitive and eczema-prone skin.

Specifications

Filter Type: Thermal Spring Gel Cartridge + Integrated Dual Filter (Sediment + Powder)

Cartridge Lifespan: Up to 60 days (Home use) / 30 days (Travel mini) based on average daily use

Scents Available:

    • Forest – A fresh, earthy blend of green leaves and floral notes, like bathing in a mountain spa

    • Sweet Sea – A clean and relaxing mix of sea breeze and soft soap, reminiscent of a coastal hot spring retreat

Certifications: ISO, World Atopy Association Top Product, Dermatologist-Tested

Package Types:

    • Home Spa Set: Large-capacity filter + dedicated shower head

    • Travel Mini: Compact portable unit with replaceable gel filter