The Varilite Wheelchair Cushions Zoid PSV (Pressure Setting Valve) provides a low profile, tapered cushion in a lightweight design that provides vibration impact dampening. The PSV senses internal cushion pressure, and then adjusting the pressure valve allows the user to control the amount of immersion into the foam. 

Features:

• Soft foam for decubitus sensitive areas
• Medium foam for main seat support
• Firm foam for the perimeter
• This 2.5" thick cushion is designed to meet international sporting regulations
• 1" Taper back to front for tighter fit
• Absence of medial thigh separator
• Extra-stiff, beveled laterals provide lateral support and improved balance
• Self-inflating technology lets the user immerse into the cushion to lower center of gravity and improve agility
• Largest size weighs only 1lb!
• Moisture-wicking cover with rolled top panel eliminates seams on underside of legs
• Only available with a mesh cover