CHOOSE YOUR VALVE.
A standard Schwalbe tube holds the air considerably longer. Due to the purity of the rubber compound. Due to the uniform wall thickness.
Reduced weight. Same reliability as the standard version. Not in all sizes.
Extremely light. Only for very few sizes.
Extremely robust. A reinforced rubber base protects against dreaded valve shearing off. Only in Downhill sizes. If you want large volume with low weight, choose Extralight.