Ergonomic Design with Massage Holes The keyboard wrist rest is with numerous massage holes and two wave-shaped grooves on both sides. It alleviates your wrist pressure by elevating your wrist to a neutral position. If you are a programmer, art designer, gaming player, this keyboard rest is suitable for your daily work. . Comfortable Memory Foam Made of premium memory foam and superfine chinlon material, the wrist rest is shock absorption, excellent wear resistance, slow rebound and soft touch. This keyboard wrist rest offers ventilation, strong support and slow bounce back for your wrist and is recommended by experts for avoiding carpal tunnel syndrome and other stress injuries. . Anti-slip Rubber Base Different from other keyboard wrist rest with resin bases, ours is with silicone bottom, which can help you hold the mouse wrist rest more firmly on the desk. NO need to worry about the mouse pad slipping away. The mouse wrist support helps you to type or click as fast as possible. . Moderate Size There are three different sizes. Large: 17.24 x3.1x1 inch. Medium: 14.13x3.1x1 inch. Small: S: 5.12x3.1x1 inch. Those sizes are all recommended by experts. Please choose the appropriate keyboard wrist rest according to your mouses size. . Guarantee and WarrantyWe are aimed at providing high-quality products and bringing better customer service for our customers. If you are dissatisfied with our keyboard wrist rest, be free to contact us and we will provide you a satisfactory solution. Thanks. .