Great chair, Great company! I had an issue, and they sent me replacement parts under their warranty without any hassle.

To keep the PVC leather of your Vertagear chair soft and pliable , I recommend using a vinyl conditioner spray. Spray it on the seat of your chair, use the low heat of a hair dryer to soften the material, gently rub the spray into the seat, let it cool before sitting. Repeat as desired.