The gentle bulge fits nicely in the cup of the hand to promote long ride comfort. The progressive tread is finest/softest where it meets the outer edges of the hand and coarsest under the meat of the palm for a balance of compliance and control over longer rides. The Squarewave is made with special formulated rubber compound that combines a soft 25a durometer and a proprietary additive for a combination of tackiness and durability. Overall length 142mm.