The Comfort series that offers a lighter weight option. Key design features include – rolled toes and branches, better breakover improves coordination of movement, optimizes balance, less pressure on the tendons. Adequate thickness to provide strength and durability. Built-in sole relief. Punched for E-head & Combo. 0 & 1 – E-4 Slim; 2 & 3 – E-5 Slim nails.