Therm-a-Rest Blocker Lite Pump Sack 30121 Outdoor This is a dry sack based on the SealLine Blocker Lite Dry Sack, with the addition of a pump function. It easily attaches to the valve and allows you to inflate your mattress more easily and quickly than with your breath. The seams are seam-welded, and it can also be used as a 20L waterproof dry sack. ■Specifications Capacity: 20L Size: 14 x 26.5 x 48cm Weight: 75g Country of Origin: China [Compatible Valves] WingLock Valve, TwinLock Valve *Please note that this product is not compatible with Classic Valves. Purchased in 2025, but never used. I am selling it because I purchased an electric type. It has been stored at home, so I will sell it to someone who is not overly concerned about minor details. Thank you.