Why Seventeen Twenty-One

A sofa built to
outlast the question.

Most sofas are replaced within seven years. The Comma is designed so that never has to happen. Here is exactly why.

Seventeen Twenty-One

Designed to adapt.
Built to stay.

Move homes. Rework your layout. Add a seat. Swap a cover. The Comma is engineered so your sofa evolves with your life, not against it.

Fast furniture brands

Built for a single setup. Replaced on a cycle.

Fixed form, fixed fabric. When life changes, the answer is usually a new sofa. That cycle is expensive and almost always unnecessary.

01 Modularity that actually means something
Seventeen Twenty-One

Arms detach. Seats reconfigure. Buy a 2-seater today and add a third module next year. The whole system connects without tools and without compromise.

Fully reconfigurable system
Typical modular sofas

Choose your layout at purchase. Arms stay fixed. Reconfiguring is not on the table after delivery day.

02 Covers that wash, refresh, and replace
Seventeen Twenty-One

Velcro off. Machine wash. Back on in minutes. Replacement covers are permanently affordable, so a worn fabric is never a reason to replace the whole sofa.

370 recycled bottles per Bouclé cover
Typical sofas

Fixed upholstery. A spill is a cleaning bill. A style change is a reupholstery quote. A worn cover is a new sofa.

03 Foam density that proves the comfort claim
Seventeen Twenty-One

The Comma uses 42kg/m³ foam density. The premium residential benchmark is 32 to 35. The Australian market average is around 19. That difference is what you feel after three years of daily use.

42kg/m³ vs 19kg/m³ AU average
Most Australian sofas

Foam density is rarely listed on a product page. That omission is itself the answer. Sofas that flatten in two years were never built to last.

04 A frame built on solid timber, not clips
Seventeen Twenty-One

Solid hardwood larch frame. No clicks. No rattles. No reminders that the sofa exists when you sit down. Backed by a 10-year structural warranty.

10-year structural frame warranty
Clip-together modular sofas

Clip construction sounds clever until the joins loosen. A frame that announces itself is a frame that will not last. The rattle is the review one year in.

05 White glove delivery with no asterisks
Seventeen Twenty-One

Delivered to your room. Assembled by our team. Every box cleared before we leave. Free. Then a 30-day trial begins. The return fee if it is not right is $99. That is the whole story.

30-day in-home trial included
Typical online sofas

Flat pack at the kerb. Room delivery is extra. Assembly is your Saturday afternoon. Returns involve booking a courier and losing the weekend.

EOFY offer — $100 off your first order. COMMA100 Expires 15 July
42 kg/m³ foam density. Twice the AU average.
10yr structural frame warranty. Hardwood larch.
370 recycled bottles per Bouclé cover set.
30 days to try it in your home. Risk free.
OEKO-TEX Standard 100
GRS Certified
REACH Compliant
Free White Glove Delivery
The Comma Sofa System

The last sofa you will
ever need to buy.

Most sofas are designed to be replaced. The Comma is designed so that never has to be the answer. Reconfigure it. Refresh the covers. Add a module. Move it to your next home.

Free white glove delivery
Sydney metro and national
30-day in-home trial
Configure Yours