Depending on your setup it might be worth investing in these https://www.amazon.com/24-SQFT-Multi-purpose-Anti-fatigue-Interlocking-10-boarder/dp/B015ZMLDX0/ref=sr_1_5?ie=UTF8&qid=1471220491&sr=8-5&keywords=foam+mat

My Vive is in a room with crappy course carpet that we're not allowed to replace so I covered the room in these. It's much better for my knees when crawling around and you can also use them to define your chaperone boundaries so you know if you step off them you're out of the zone.