# Office chair Topstar Sitness 15 Green — ergonomic adjustable seating with sitness technology

**URL:** https://aio.lv/en/product--topstar-st19ug05--3967934
**Data updated:** 2025-12-29 13:55 (EET)
**Category:** Ergonomic Chairs
**Manufacturer:** Topstar
**Manufacturer code:** ST19UG05
**EAN:** 4014296111575
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 267.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 221.48 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--topstar-st19ug05--3967934

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Courier delivery to door | 17.07.2026 | 5.06 EUR |

## Summary description

Topstar Sitness 15 Green is an ergonomic office chair designed for active sitting and everyday work. The adjustable chair features Topstar's Sitness mechanism that encourages micro-movements while seated, promoting posture and comfort. It suits home office or workplace use, offering height adjustment and supportive seating to reduce strain during long periods of sitting.

## Long description

Topstar Sitness 15 Green is an ergonomic office chair designed for active sitting in home offices and workplaces. The chair incorporates Topstar's Sitness mechanism to allow subtle micro-movements while seated, supporting a natural posture and reducing static load during long work sessions. It includes adjustable seat height and a supportive backrest in a green upholstery finish.
Advantages
The Sitness mechanism promotes continuous small movements that help maintain spinal alignment and relieve pressure on the lower back. Adjustable seat height enables correct desk positioning, and the supportive seat and backrest provide stable comfort for everyday use. The chair's build and materials are chosen for regular office use and straightforward maintenance.
Suitable for
Home office workers who need ergonomic seating for daily computer work
Office environments requiring active sitting solutions
Users seeking adjustable height and supportive seating for long periods
Key specifications
Brand: Topstar
Model: Sitness 15 (ST19UG05)
Colour: Green
Mechanism: Sitness active-sitting mechanism
Features: Height adjustment, supportive backrest
EAN: 4014296111575
How to use
Adjust the seat height so your feet rest flat on the floor and your thighs are approximately horizontal. Sit with your back lightly supported by the backrest and allow the Sitness mechanism to enable natural micro-movements. Make small posture adjustments during use to engage core muscles and maintain comfort. For change of tasks or longer breaks, stand and move periodically.
Usage recommendations
For optimal ergonomic benefit, combine correct seat height and regular posture changes. Inspect moving parts occasionally and follow the manufacturer's care instructions to preserve function and appearance.

## FAQ

### How much does the Topstar Sitness 15 Green office chair cost, and is it available for purchase?

The price is 267.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 39 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Topstar products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Topstar service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/3967934/47498577_large.webp