The Hogue grip is designed to retain the lines and aesthetics of the AR, while at the same time providing a comfortable rubber grip with finger grooves.  Made from durable synthetic rubber, the Hogue soft rubber grips, do not affect your accuracy, but do give you a soft recoil absorbing feel, without that spongy, tacky, feeling.  This material will not come apart, deteriorate or absorb the common solvents and oil gun owners often use resulting in a much superior grip than you are used to. To retain their shape Hogue uses a modern, light weight synthetic insert that chemically bonds to the rubber, this gives you a lasting precision fit and durability and prevents them from delaminating or coming apart for years to come.