Q-Tubes 29in Presta Mountain Tube
You can't ride without tubes--well, you can, but that's neither here nor there--so having a replacement ready to go is always a good idea. Q-Tubes' 29in Presta Mountain Tube is exactly what it sounds like--a 29in rubber tube with a Presta valve that's made for your mountain bike. Respectably... Details BUY THIS PRODUCT!
Q-Tubes Cyclocross Tube
The Q-Tubes Cyclocross Tube holds air, has a removable valve core, and has a 48mm-long valve stem -long enough to clear mid-depth wheels. It'll work best with tires between 28 and 32mm wide. Details BUY THIS PRODUCT!