This is a Sea to Summit Ultra-Sil Compression Sack. The size is M, and it's suitable for sleeping bags down to around -10°C. There is some wear and tear from use, but there are no holes or tears, and it can be used without any problems. What I'm selling is the compression sack in the image. Here's the product information: "The perfect compression sack for users who want to compress their gear compactly but also want to keep the weight down." 30D diamond ripstop silicone-coated Cordura® Flip design on the top lid to prevent straps from tangling Four straps for balanced compression of the sack Long straps that can compress even when the capacity is full Bartack reinforcement at stress points Pull handle on the bottom Smooth, slippery fabric for easy packing Capacity M = 4.5 to 14 liters Weight M = 78g Size M 14 liters = 20 x 46 cm