The Wellell Sedens 400 Pressure Relief Cushion is a lightweight, portable seating solution designed to enhance comfort and reduce the risk of pressure injuries. Ideal for wheelchair users or individuals sitting for extended periods, this hybrid cushion combines the reliability of foam with the adaptive support of air technology—without requiring electricity. With a weight capacity of up to 264 lbs.
No Power Required – Simple and Efficient Use
This cushion requires no electricity or pump for initial setup, making it perfect for home, travel, or clinical environments. The self-inflating design ensures it’s ready to use with minimal effort, offering convenience without compromising performance.
Innovative Hybrid Air and Foam Construction
The Sedens 400 features a single-piece cushion design that combines foam encasement with six air cell-like chambers. This structure is engineered to reduce the risk of bottoming out while improving comfort and durability, especially during long sitting periods.
Adjustable Immersion for Customized Pressure Relief
An easy-to-use air valve lets users adjust the immersion depth of the cushion. This allows for better control over pressure distribution, giving users the flexibility to fine-tune support according to their body type and comfort preferences.
Moisture-Wicking and Skin-Friendly Top Cover
The 4-way stretch cover promotes airflow and helps diffuse moisture, maintaining a dry and comfortable surface. This helps protect skin integrity and reduces the risk of skin breakdown, especially important for users with sensitive skin or limited mobility.
Optional Alternating Pressure Mode for Advanced Support
For users needing enhanced pressure management, the Sedens 400 can be connected to a compatible alternating pressure pump. This feature helps redistribute pressure at regular intervals, providing dynamic relief and reducing the risk of pressure ulcers over time.
The connector able to work with some of our air mattresses pump (Domus 3, Domus 4, Domus Auto & Procare series)
Quick Overview
Features with Benefits
Lightweight & Portable: Easy to carry and perfect for wheelchairs, office chairs, or travel use.
Self-Inflating Design: No need for electricity or pumps—just open the valve and it's ready to use.
Hybrid Air-Foam Construction: Combines foam and air chambers to provide consistent pressure relief.
264 lbs Weight Capacity: Supports a wide range of users with reliable seating stability.
Bottoming-Out Protection: Single-piece cushion with six air cell-like structures minimizes the risk of sinking too low.
Adjustable Air Valve: Allows users to control immersion level for customized support and comfort.
4-Way Stretch Cover: Enhances moisture control and promotes airflow to protect skin.
Pump-Compatible Option: Can connect to an alternating pressure pump for dynamic pressure redistribution.
Designed for Pressure Injury Prevention: Helps reduce the risk of pressure sores and improves long-term sitting comfort.
The Wellell Sedens 400 Lightweight Pressure Relieving Seat Cushion comes with a 12-month limited warranty.
Warranty Information
The Wellell Sedens 400 Lightweight Pressure Relieving Seat Cushion comes with a 12-month limited warranty.
Order Processing
Once your order is placed, you will receive an order confirmation email confirming that we have received and begun processing your order.
Stock availability is confirmed after purchase:
In stock: Your order will be prepared and shipped.
Out of stock/backorder: We will contact you with available options, which may include an estimated restock date, an alternative product, or a refund if you choose not to proceed.
You will receive email updates throughout the process, including tracking details once your order ships.
Cancellations within 24 hours may be approved at our discretion only if the order has not been placed/paid with the supplier or shipped.
Returns
Returns are accepted within 7 days of delivery for most products. All approved refunds are subject to a 25% restocking fee, and all shipping and any white-glove delivery costs are non-refundable.
After 7 days, and up to 14 days from delivery, eligible orders may be exchanged only, subject to the same condition requirements.
Certain products, including pre-orders, backorders, custom items, and select brands, are final sale and not eligible for return, refund, or exchange. After 14 days from delivery, all sales are final.
Condition of Returns
Returned items must be unused, in their original packaging, and include all accessories, components, and documentation. Return shipping costs are the customer’s responsibility and are non-refundable.
Pre-orders and backorders are paid in full at the time of purchase to secure inventory that is specifically allocated to your order.
Once placed, we immediately commit funds with our suppliers and reserve inventory. For this reason, pre-orders and backorders cannot be cancelled and are non-refundable once confirmed.
Estimated shipping timelines are provided in good faith. Delays may occur due to factors outside our control, including manufacturing schedules, supplier availability, or freight and logistics issues.
If an exception is approved at our sole discretion, a cancellation and restocking fee will apply and will be deducted from any approved refund.
Final Sale Items
The following categories are non-returnable and non-refundable:
Beds and mattresses
Batteries and chargers
All lifts (residential, vehicle, and patient lifts)
Lift chairs, geri chairs, and patient room chairs
Wheelchair cushions, support surfaces, and slings
Mobility accessories
Red light therapy devices
All products sold under the brand Discover Your Mobility
View the full list of non-returnable brands here .
Defective or Damaged Items
If an item arrives defective or damaged, the manufacturer will offer a replacement at no cost. Issues must be reported within 24 hours of delivery.
A replacement requires the defective item to be returned before a new unit is shipped. A prepaid return label will be provided for approved claims.
If you decline a replacement and request a return instead, the request will be handled under the standard return policy, including a 25% restocking fee and non-refundable shipping costs.
Damage not reported within 24 hours may not be eligible for a claim.
Missed Deliveries & Refused Shipments
Large or freight items are delivered to the address provided at checkout and are typically not returned to sender. Tracking details will be provided.
If an order is refused at delivery or returned to the sender, a 25% restocking fee will apply, and you are responsible for all outbound and return shipping costs.
Warranty
All products are covered by the manufacturer’s warranty, which varies by brand. We can provide proof of purchase and assist with documentation; however, warranty claims are handled directly by the manufacturer.
After the return period, repair or replacement decisions are subject to the manufacturer’s warranty terms and may require return of the defective item.
Chargebacks & Disputes
If you experience any issues with your order, please contact us first so we can assist.
By placing an order, you acknowledge and agree to this policy. In the event of a payment dispute or chargeback, this policy and supporting documentation may be provided to your financial institution for review.
Agreement & Disclaimer
By placing an order with FirstClassMobility.com, you confirm that you have read, understood, and agree to this policy, including applicable restocking fees, shipping costs, and final sale exclusions.
All product specifications are provided by the manufacturer as a general guide. Actual measurements and performance may vary due to manufacturing tolerances, optional accessories, or product updates.
Sedens 400 Lightweight Pressure Relieving Seat Cushion Brochure