The Slang has a Drag-flick groove for faster ball acceleration and precision. Also with the oval endcap of the stick for a more extreme bow shape. The Lekker Slang have the location of the bow curve at 200 mm and complies with FIH limit with a 24mm bow. 

The handle with an anti-shock foam layer gives an excellent sensation when hitting and stopping.  This option is in 90% carbono / 10% Kevlar.