Canon WP-DC34 Waterproof Housing for PowerShot G11 Digital Camera with Accessory Kit, ( includes,Canon WW-DC1 Weight Set (4 pack), Silicon Grease Lubricant, Silica GelPacks, Professional Lens Cleaning Kit)
The Waterproof Case for the Powershot G-11. lets you take your camera safely out to sea in a boat, on a surfboard, in a kayak...or up to 130 ft./40m beneath the surface.
For the underwater enthusiast, Canon offers an optional waterproof case weight set (WW-DC1) that is compatible with all of its underwater housings. Available in packs of four, these weights allow the camera to stay put for steady underwater photography.