Michelin's Airstop name says it all. Their Airstop tubes use a proprietary butyl rubber that holds pressure longer so you won't have to top off your tires so much. These fine tubes are reinforced at the valve, too.
|Option||Barcode||Manufacturer's Part Number||Vendor Number|
|700 x 18-23c||00086699103574||10357/229650||QBP-TU8103|
|700 x 25-32c||00086699502957||50295||QBP-TU8104|