MATERIAL: These memory foam armrests are very soft and perfectly fit the shape of the forearm. Provide supreme comfort for your elbows, dispersing pressure, promoting blood circulation and relieving pain. The PU cover is elastic environmental protection, and will give your office chair armrests a pleasant comfortable feeling. There are the anti-slip silicone dots at the bottom, more stable when used DIMENSIONS: Length about 254mm, Width about 75mm, Thickness about 35mm ( If the armrest length of your chair exceeds 300mm, these armrests are relatively a bit short ) SCOPE OF APPLICATION: Suitable for most chairs with armrests, e.g. office chairs, gaming chair, dinette, wheelchairs, etc.. If the armrests are not very wide or long (they are standard size), well, this chair armrest cushion is suitable USES: Memory foam armrest can be used on the arm of an office chair, an armchair and can also be used as a keyboard with pad. For this arm elbow armrest chair can improve the position dispersal pressure, relieve elbow pain WASHING TIPS: Covered washable, the armrest covers are equipped with invisible zipper, it just unzip and toss in the wash for quick and easy cleanup. Hand wash recommended. Do not bleach or run through a hot dryer to prevent too much shrinkage