※The price listed in the title is for a single size. [Production Background] Aiming for "Thump, thump, thump. Packing complete!!" For a long time, I've used Hyperlite Mountain Gear pods for packing on my mountain trips. Their D-shaped design, like a sliced-open backpack, allowed for no wasted space when packing and was very convenient for storing items like sleeping bags and down jackets that wouldn't be used until reaching the campsite, all while being waterproof. However, buying multiple was expensive, and I also wanted a larger size to store sleeping bags and down items together. [Features] ● The footprint is designed to be optimal for a 40L backpack, inspired by the pods. ● Three sizes are available based on height, also inspired by the pods. Pods Small is envisioned as equivalent to S size, and Pods Large as M size. The L size is designed to fit a 3-season down quilt and a down jacket when compressed. ● For sample images of capacity, please refer to our other product, "Mountain Stacking Box M Size ■ Dyneema Hybrid Black," which has the same dimensions. ● High strength with sewing + seam tape processing There are two methods: bonding and sewing + seam tape processing. For this product, we chose sewing + seam tape processing to enhance strength. Due to the nature of DCF fabric, there is a reduction in strength at needle holes. Seam tape compensates for this, significantly increasing durability. Dyneema tape is very expensive and requires considerable effort, but we consider it an essential specification for items that will be compressed and put stress on the seams. [STACK40 Series] Designed for 40L backpacks with a focus on stackability. The base is unified, so stacking S/M/L sizes fits neatly. It's also compatible with half-size and roll-top stuff sacks. This series is for UL-oriented hikers. [Specifications] Size: Approximately 315 mm (width) x 220 mm (height) x 140 mm (depth) (excluding knobs) Material: DCF 1.43oz, YKK AquaGuard Weight: Approximately 44g [Notes] ● While the seams where Dyneema is sewn together are seam-sealed, this does not guarantee waterproofing. ● Decorations other than the item in the title are not included. ● We will ship the item as compactly and simply packaged as possible.