The Oasis OH-22 Grip-Strip is formulated from high-quality, textured, neoprene rubber. Precisely designed with slip resistant anti-skid ridges, it creates a secure grip for your guitar whenever its resting on your leg. You don’t have to worry about your guitar slipping and sliding around while you’re playing anymore. Grip-Strip works with both steel string and classical guitars, and it wont harm the French polish finish on classical guitars.