ULTRA THICK MEMORY FOAM: experience more comfort while you work; thickest memory foam interior of the wrist rest features an ergonomic, slow rebound for more comfort than ever; inner foam measures nearly 1.2 inches thick; youll never want to work without this rest ever again ERGONOMIC DESIGN: forget sore wrists and fingers when typing and using a mouse; these rests are designed to help alleviate sore muscles, stress, and aches and pains by elevating your wrists to help aid in your muscles moving freely without being weighted down SLIP-RESISTANT BACKING: the ultra durable bottom layer of the rests are designed to stay in place on most desk surfaces, so you can worry less about adjustments and focus on your work SUPERIOR CONSTRUCTION: featuring a 3 layer design, the rests are designed for long lasting use; durable rubber bottom stays in place on most surfaces; thick inner memory foam material for extra support; soft top spandex layer for additional comfort; wrist rest measu