These pumps are sturdy and easy to use. The Top-Off pump does a great job, so it is the only pump we take on the river. It has a webbing crown to hold the plunger in place until it is needed - just a quick release of the buckle and it's ready to go.
The 4" Barrel pump is three times the volume of the Top-Off pump and comes with a 6' hose and hose strap.