Senza Ergonomic Asynchro Task Chair in Blue with 24-Hour Continuous Support

Senza Ergonomic Asynchro Task Chair, Blue

 stops the ache that sets in halfway through a long shift. Sitting for eight, twelve, or twenty-four hours straight puts immense stress on your lower back and thighs, but this seat adapts directly to your body's subtle shifts throughout the day.

Built for Continuous Wear Unlike Standard Desk Chairs

Budget office chairs use low-density foam that flattens out after a few months, leaving you sitting on hard plastic and metal. The Senza is engineered for round-the-clock 24-hour environments using high-resilience CMHR foam that retains its shape, paired with an extra-high back and a sturdy chrome base that handles up to 150 kg without wobbling or sagging.

Engineered Adjustability for Personalised Support

• Asynchro Tilt & Back Rake Mechanism: Operates the seat and back movement independently, letting you fine-tune your exact recline angle while keeping your spine properly supported.
• Integrated Lumbar & Seat Depth Control: Shifts the lower support pad and seat pan forward or back to fit your leg length, relieving pressure behind your knees.
• Weight Tension Gas Lift: Adjusts the smooth recline resistance automatically based on your body weight, spanning a seat height range from 47 cm to 60 cm.
• 360° Swivel & Adjustable Arms: Provides full movement around your desk setup while taking the weight off your shoulders and wrists.
• Key Technical Specifications

Ideal for Intensive Workspaces and Multi-Shift Desks

Whether you are equipping a busy dispatch station, a multi-user control room, or a dedicated home office, this chair adjusts quickly between different users without fuss. Its vibrant blue fabric brings a fresh splash of color into focused work environments while keeping your posture aligned from morning to night.

Availability and Dispatch

In stock and ready to ship with prompt UK arrival straight to your office door through our dependable courier service.

FAQs

Q: Can this chair really handle 24-hour continuous use?

 A: Yes, it is constructed with high-resilience CMHR foam and a reinforced frame rated for round-the-clock shift work and up to 150 kg.

Q: How do I adjust the chair to suit my height and posture?

 A: Levers beneath the seat control the gas lift height, back rake angle, seat depth, and lumbar position, allowing you to set each point independently.

Q: How long will it take for my order to reach me?

 A: Orders are processed quickly for rapid mainland delivery across the UK using standard trackable couriers.

Shipping & Returns

Reliable UK Delivery

Mainland UK: Orders are typically delivered within 3–5 business days.

Fast Dispatch: Orders are processed and dispatched within 1–2 business days (Monday–Friday, excluding UK Bank Holidays).

Tracked Delivery: Once your order has been dispatched, you’ll receive tracking details by email so you can follow its journey.

Delivery Areas: We currently do not deliver to Northern Ireland, the Scottish Highlands & Islands, Isle of Man, Isles of Scilly, or the Channel Islands.

Delivery Charges: Shipping costs are calculated and displayed at checkout before you complete your purchase.

Easy 14-Day Returns

14-Day Returns: You have 14 days after receiving your order to request a return.

Return Condition: Products must be unused, in their original condition, and returned in their original packaging with any included accessories or documentation.

Damaged or Faulty Items: If your order arrives damaged, faulty, or incorrect, please contact us as soon as possible so we can help resolve the issue.

Return Shipping: For non-faulty returns, the customer is responsible for return postage costs. Where an item is faulty or incorrect, return arrangements will be handled in accordance with our returns policy and applicable consumer protection laws.

Refunds: Once an eligible return has been received and approved, your refund will be processed to your original payment method.

OfficeNstationery Shipping Policy

Last Updated: 21 October 2026

At OfficeNstationery, operated by MENSARK LTD, we aim to provide reliable delivery services across the United Kingdom. Please review our shipping policy for information about order processing, delivery times, and shipping restrictions.

1. Order Processing Times

Processing Window: Orders are generally processed within 1–2 business days (Monday–Friday, excluding UK Bank Holidays).

Notifications: If significant delays occur due to high order volumes or carrier issues, we will provide updates where possible through the contact details supplied with your order.

2. Shipping Methods & Delivery Timelines

We offer standard and express delivery options where available.

Shipping Method: Standard Delivery

Estimated Delivery: 3–5 business days for eligible Mainland UK locations.

Shipping Method: Express Delivery

Estimated Delivery: 2–3 business days for eligible Mainland UK locations.

Charges: Delivery charges may vary depending on your location, order, and selected shipping method. Applicable charges will be displayed at checkout.

Carrier Partners: We work with delivery providers to help ensure your order arrives safely.

Delivery estimates are provided as a guide and may vary depending on the destination, product, and carrier.

3. Areas Where Delivery May Be Unavailable

Delivery is currently unavailable to certain postcode areas, including remote locations and islands.

Restricted areas include:

Scottish Highlands: AB36–38, AB55–56, FK17–21, IV1–39, IV52–54, IV63, KW1–14, PA21–40, PH19–26, PH30–41, PH49–50.

Scottish Islands: HS1–9, IV40–51, IV55–56, KA27–28, KW15–17, PA20, PA41–49, PA60–78, PH42–44, ZE1–3.

Northern Ireland: BT postcodes.

Isle of Man: IM postcodes.

Isles of Scilly: TR21–25.

Channel Islands: GY (Guernsey) and JE (Jersey) postcodes.

Availability may depend on the delivery provider and the products ordered. Please confirm delivery availability for your address at checkout before placing an order.

4. Order Tracking

Once your order has been dispatched, tracking details will be provided where supported by the delivery service.

These may include:

• Your unique tracking number.
• A link to track your parcel through the carrier's website.

Note: Tracking information may take up to 24 hours to become active in the carrier's system.

5. Delayed, Lost, or Damaged Shipments

Reporting Issues: If your order arrives damaged, is missing, or is significantly delayed, please contact us through the Contact Us page on the OfficeNstationery website.

Documentation: For damaged items, please provide your order number and clear photographs of the packaging and product where possible.

Resolution: We will review the issue and work with the delivery provider where appropriate to resolve it. Refunds or replacements will be handled in accordance with applicable consumer protection laws.

6. Failed Delivery & Redelivery

Address Accuracy: Customers should check that their delivery address is accurate when placing an order.

Redelivery: If a parcel cannot be delivered because of an incorrect address, customer unavailability, or failure to collect it, additional delivery costs may apply where permitted by law and disclosed to the customer.

Delivery Issues: If you believe a delivery has failed incorrectly, please contact us through our website's Contact Us page so we can investigate.

7. Contact Us

For questions about our shipping policy or a specific delivery, please use the Contact Us page on the OfficeNstationery website.

Please include your order number and delivery details so we can assist you.

Company Information

Business Name: OfficeNstationery

Legal Company Name: MENSARK LTD

Company Number: 16552046

Shipping policy

Office N Stationery Shipping Policy

Last Updated: 21 October 2026

At Office N Stationery , operated by MENSARK LTD, we aim to provide reliable delivery services across the United Kingdom. Please review our shipping policy for information about order processing, delivery times, and shipping restrictions.

1. Order Processing Times

• Processing Window: Orders are generally processed within 1–2 business days (Monday–Friday, excluding UK Bank Holidays).

• Notifications: If significant delays occur due to high order volumes or carrier issues, we will provide updates where possible through the contact details supplied with your order.

2. Shipping Methods & Delivery Timelines

We offer standard and express delivery options where available.

• Shipping Method: Standard Delivery.

• Estimated Delivery: 3–5 business days for eligible Mainland UK locations.

• Shipping Method: Express Delivery.

• Estimated Delivery: 2–3 business days for eligible Mainland UK locations.

• Charges: Delivery charges may vary depending on your location, order, and selected shipping method. Applicable charges will be displayed at checkout.

• Carrier Partners: We work with delivery providers to help ensure your order arrives safely.

Delivery estimates are provided as a guide and may vary depending on the destination, product, and carrier.

3. Areas Where Delivery May Be Unavailable

Delivery availability may be limited for certain postcode areas, including remote locations and islands. Please check whether delivery is available for your address at checkout before placing an order.

Potentially restricted areas may include:

• Scottish Highlands: AB36–38, AB55–56, FK17–21, IV1–39, IV52–54, IV63, KW1–14, PA21–40, PH19–26, PH30–41, PH49–50.

• Scottish Islands: HS1–9, IV40–51, IV55–56, KA27–28, KW15–17, PA20, PA41–49, PA60–78, PH42–44, ZE1–3.

• Northern Ireland: BT postcodes.

• Isle of Man: IM postcodes.

• Scilly Isles: TR21–25.

• Channel Islands: GY (Guernsey) and JE (Jersey) postcodes.

Availability may depend on the delivery provider and the products ordered. Please confirm these restrictions against your actual shipping arrangements before publishing this list.

4. Order Tracking

Once your order has been dispatched, tracking details will be provided where supported by the delivery service. These may include:

• Your unique Tracking Number.

• A link to track your parcel through the carrier's website.

• Note: Tracking information may take up to 24 hours to become active in the carrier's system.

5. Delayed, Lost, or Damaged Shipments

• Reporting Issues: If your order arrives damaged, is missing, or is significantly delayed, please contact us through the Contact Us page on the Office N Stationery website.

• Documentation: For damaged items, please provide your order number and clear photographs of the packaging and product where possible.

• Resolution: We will review the issue and work with the delivery provider where appropriate to resolve it. Refunds or replacements will be handled in accordance with applicable consumer protection laws.

6. Failed Delivery & Redelivery

• Address Accuracy: Customers should check that their delivery address is accurate when placing an order.

• Redelivery: If a parcel cannot be delivered because of an incorrect address, customer unavailability, or failure to collect it, additional delivery costs may apply where permitted by law and disclosed to the customer.

• Delivery Issues: If you believe a delivery has failed incorrectly, please contact us through our website's Contact Us page so we can investigate.

7. Contact Us

For questions about our shipping policy or a specific delivery, please use the       page on the Office N Stationery website.

Please include your order number and delivery details so we can assist you.

Company Information

 Business Name: Office N Stationery 

Legal Company Name: MENSARK LTD

Company Number: 16552046

Business Name: