I recently suffered a spell of repetitive strain injury and to help purchased this Fellowes keyboard wrist rest memory foam, although it can't obviously cure the symptoms, it has made things more comfortable for me with typing on a daily basis at my job. It responds to wrists weight and warmth. I have it several months now and as of yet it never loses shape. The soft foam pillow conforms to your wrist for exceptional comfort It also improves hand position and is non-slip. I have had other brands in the past but this is by far the most comfortable for me. I had delivery the next day too.