Marvelux 36" x 48" Vinyl (PVC) Lipped Chair Mat for Very Low Pile Carpets | Transparent PVC CARPET CHAIR MAT FOR LIGHT USE 36" x 48" (20 x 10" LIP) - Great value carpet protection. Suitable for carpet tiles and very low pile carpets (up to 1/4" thick), available in rectangular or lipped shapes. We recommend you choose polycarbonate for high usage or weight exceeding 180lbs. SMOOTH EASY GLIDE SURFACE - This PVC chair mat is ergonomically designed to provide added ease of movement, which is proven to reduce leg fatigue by taking the strain off your legs. STUDDED BACK VINYL CHAIR MAT - Provides effective grip to help to prevent damage to low pile carpet caused by your office chair casters or wheels. See our extensive range of chair mats for standard, medium and plush pile carpets. FAMILY FRIENDLY - No Phthalate, No Toxins, No Cadmium, No Tin and No Lead. SHIPPED FLAT - Our small size chair mats (30" x 48" and 36" x 48") are shipped flat and our larger sizes (48" x 51" and 48" x 60") are shipped rolled.