SUNDAY MOUNTAIN's custom synthetic sleeping bag made in collaboration with NANGA, designed for camping. Available in three earth-tone colors that blend in with the field. This is a SUNDAY MOUNTAIN limited edition NANGA custom series, with the original logo embroidered on the left chest. The SF800 features 800g of insulation, a specification not found in NANGA's regular lineup. Designed for three-season (spring, summer, and autumn) use, it's a versatile model that's perfect for camping, outdoor festivals, as well as at home or in a car. The outer fabric is a lightweight yet durable 20dn ripstop nylon. The "Dacron® Fiberfill" insulation material retains its shape even after repeated washing, provides high heat retention, and has a soft, fluffy texture. It's a low-allergen material that doesn't easily produce dust, so those concerned about animal allergies can use it with peace of mind. (※Dacron is a high-performance insulation material developed by Invista, USA) Also, while it's not as compact as down, synthetic sleeping bags have the advantage of being resistant to moisture and quick-drying. I have opened it, but it is unused. Please consider it if you are interested.