The newest compression stuffsack from Granite Gear. It's the answer for the ultralight packer who wants to save weight by compressing gear and carrying a smaller pack. If you're familiar with the Rock Solid compression stuffsacks, you know Granite Gear has been making the best packing systems since their beginning in 1986. If you think about it, these stuffsacks need to handle a lot of stress, and it's no easy feat to shave ounces, but that's exactly what they've done. 210 denier lid and arches are beefy where it's needed. The Bloc shape is an innovation to help you pack more efficiently inside your pack. Compared to a round shape, the bloc fits better into the corners of your pack, they stack nicely, and eliminate all the "dead air" that can happen when you try to pack with round stuffsacks. Less dead air means better load stability, quicker pack loading, and the possibility of carrying the same amount of gear in a smaller pack, saving you weight.