NWT Expandable Packing Cube Set - Small/Medium/Large Color: Red Smolder Made of light, strong ripstop nylon with a durable water repellent (DWR) finish Mesh on top lets you see what's inside and lets your stuff breathe Top and side handles make opening, closing and expanding the cube quick and easy Expansion zipper lets you adjust size from 3.5 liters up to 6 liters (small); 8.5 liters up to 13 liters (medium); and from 14 liters up to 21 liters (large) REI is Climate Neutral Certified; as we work to actively reduce our footprint, we measure annual carbon emissions and purchase an equivalent amount of verified carbon credits