KOHLER Bathtub Guide: Underscore, Villager, Freestanding, BubbleMassage & VibrAcoustic

KOHLER has manufactured bathtubs since its founding in 1873 — the company literally started as a cast iron bathtub maker. Today, KOHLER offers everything from the simple, reliable Villager to the technologically advanced VibrAcoustic sound-therapy tub. This guide covers materials, styles, and the innovative technologies that set KOHLER apart.

KOHLER Bathtub Materials

Cast Iron

KOHLER's heritage material. Cast iron tubs are made by pouring molten iron into a mold, then applying multiple layers of enamel. The result is a surface that's virtually indestructible — resistant to scratching, chipping, staining, and fading. Cast iron retains heat longer than any other tub material, keeping bathwater warm. The tradeoff: weight. A cast iron tub weighs 300-400+ lbs and requires adequate floor support.

Acrylic

Lightweight, warm to the touch, and available in more shapes and sizes than cast iron. KOHLER uses high-quality acrylic reinforced with fiberglass for structural integrity. Acrylic is easier to install (100-150 lbs) and costs less than cast iron. It's also the material used for most freestanding and specialty tubs.

Enameled Cast Iron vs Acrylic — Quick Comparison

Popular KOHLER Bathtub Lines

Underscore — Modern Versatility

KOHLER's most versatile bathtub line. The Underscore is available as an undermount, drop-in, or freestanding tub in multiple sizes (60" and 66"). It's the platform for KOHLER's advanced hydrotherapy technologies — BubbleMassage and VibrAcoustic are available as add-ons. Clean, modern lines work in contemporary and transitional bathrooms.

Villager — Reliable Value

The Villager is KOHLER's workhorse alcove bathtub in enameled cast iron. Standard 60" x 30" alcove installation, integral apron, slip-resistant bottom. It's the tub contractors trust for renovations and new construction. Simple, durable, affordable.

Freestanding Tubs

KOHLER offers freestanding tubs from sculptural modern designs to classic clawfoot styles. The Abrazo (acrylic, modern), the Iron Works Historic (cast iron, traditional), and the Ceric (lithocast, organic) are standouts. Freestanding tubs are the centerpiece of a luxury bathroom — plan plumbing access (floor-mount or wall-mount filler) before selecting your tub.

KOHLER Bathtub Technologies

BubbleMassage

Unlike traditional whirlpool jets that push water, BubbleMassage releases thousands of tiny, heated air bubbles that gently massage the body. It's quieter, more hygienic (no water recirculation), and creates a champagne-like bathing experience. Available as a factory-installed option on select Underscore and other models.

VibrAcoustic

KOHLER's most innovative bath technology. VibrAcoustic uses speakers built into the tub walls to transmit sound waves through the water, creating a full-body sound-therapy experience. Pair it with music via Bluetooth, or use preset therapeutic frequencies. Combined with chromatherapy (colored LED lighting), it transforms a bath into a multi-sensory wellness experience.

Choosing the Right KOHLER Tub

Browse our selection: KOHLER Bathtubs