Categories: Seating, Spex Backrests

Zygo Deep Contour Mid Back Support

Zygo Wheelchair Back Support – Mid Height Deep Contour for Maximum Postural Support

The Zygo wheelchair back support is designed for full-time, self-propelling wheelchair users who need enhanced posture, stability, and comfort. With built-in laterals, it delivers firm trunk support while still allowing functional movement for daily activities.

This lightweight, rigid wheelchair backrest is breathable, easy to adjust, and simple to install or remove—providing a practical and personalised seating solution. Zygo improves comfort, positioning, and pressure relief, helping users stay supported throughout the day.

Unlike standard sling backs, which often lack proper support, the Zygo back support promotes optimal spinal alignment and reduces discomfort during prolonged sitting. Its rigid structure is ideal for users who require greater postural control and stability.

Developed by Spex Seating, Zygo is available in multiple sizes to suit a wide range of users without the need for complex customisation.

The mid-height shell with a supportive deep contour provides:

Pelvic, lumbar, and thoracic spine support
Enhanced stability for users with limited trunk mobility and strength
Improved posture and pressure distribution for long-term sitting
Height options to support mid-thoracic to upper-thoracic regions

Specifications

Weight Capacity

Zygo Style	Size	Weight
Zygo Deep Mid	16″ x 16″	1.2kg

Maximum Occupant Weight: 136kg

Size Options

The Zygo Back Support family implements a unique “user-focused” scripting process where the size is determined by the user size, not the wheelchair width, thereby ensuring a tailored fit to the torso. See our Zygo fitting guide.

Deep Mid – Sizing Table
Zygo Size	Outer Width	Inner Width	Height	Depth	Lateral Height	Lateral Position	Code
10″ x 9″	8.8″	6.8″	9″	2.5″	4.3″	2.3″	1251-1009-0DM
10″ x 11″	8.8″	6.8″	11″	2.5″	4″	2.8″	1251-1011-0DM
12″ x 10″	10.8″	8.8″	10″	3″	4.8″	2.5″	1251-1210-0DM
12″ x 12″	10.8″	8.8″	11.5″	3″	4.9″	3.1″	1251-1212-0DM
12″ x 13″	11″	9″	12.5″	3.8″	5.3″	3.1″	1251-1213-0DM
14″ x 13″	12.9″	10.5″	13″	3.6″	6.6″	2.9″	1251-1413-0DM
14″ x 15″	12.9″	10.5″	15″	3.6″	6.1″	3.6″	1251-1415-0DM
14″ x 16″	13.5″	11.2″	16″	4.7″	6.1″	3.8″	1251-1416-0DM
16″ x 14″	15.1″	12.8″	14″	5.2″	7″	3.1″	1251-1614-0DM
16″ x 16″	15.1″	12.8″	16″	5.2″	6.3″	3.6″	1251-1616-0DM
16″ x 17″	15.2″	12.9″	17″	6″	7.2″	3.4″	1251-1617-0DM
18″ x 15″	17″	14.7″	14.5″	5.7″	7″	3.3″	1251-1815-0DM
18″ x 17″	17″	14.7″	16.5″	5.7″	6.6″	3.6″	1251-1817-0DM
18″ x 18″	17.3″	14.9″	18″	6″	6.6″	4.4″	1251-1818-0DM
20″ x 15″	19″	16.7″	15″	6.3″	7.4″	3.5″	1251-2015-0DM
20″ x 18″	19″	16.7″	17.5″	6.3″	6.7″

Thickness

Zygo Style	Width	Supportive Pink PU Foam	Velcro Grey Contouring Layer	Overall Thickness
Zygo Mid	10″ to 14″	25mm	3mm EVA	30mm
Zygo Mid	16″ to 20″	30mm	3mm EVA	30mm

Hardware Selection

Crash tested and transport certified to ISO 16840-4:2009

Accessories

Drop Mount Hardware

The lightweight Drop Mount hardware self-locks into place and is simple to operate with a single combined clamp and mechanism unit. The release mechanism is simple to operate, and suitable for single-handed use, and those with limited hand function. The hardware gives plenty of adjustability and rigidity and can be used on a wide range of wheelchair frames.

Developed using a composite material the Drop Mount Hardware is lightweight (600-800g) without compromising on durability.

Available in four sizes, ensures the visual footprint of the hardware is paired perfectly to the back support size. The hardware fits 10” to 20” wide backs which are between 7” to 18” tall.

Size	Code	Width Adjustment	Depth Adjustment	Wheelchair Compatibility: when used with Zygo back supports	Wheelchair Compatiliby: when used with Spex back supports	Weight
Paediatric	1259-1400-00P	1″	2″	+2″ to -2″	+2″ to -0″	600g
Small	1259-1400-00S	1.7″	1.5″	+2″ to -2	+3″ to -0″	600g
Medium	1259-1400-00M	1.7″	2″	+2″ to -2″	+3″ to -0″	700g
Large	1259-1400-00L	2.3″	3″	+2″ to -2″