1. Seam-sealed technology（seamless means that the filling is compartmentalized using press-gluing, which does not create additional pinhole seams, but still creates partial quilting at cuffs, etc.） 2. The main cover is filled with 35g of white duck down, featuring 90% white duck down content and a 650 fill power standard. 3. Adjustable lens sleeve accommodates lenses of different lengths. The telephoto edition is equipped with an independent lens sleeve (suitable for 150-450mm lenses) 4. The tightenable double sleeve design can fully lock in warmth and prevent fogging. 5. IPX4-rated water-repellent fabric 6. Two-way YKK zippers for quick camera insertion and tripod setup 7. Equipped with NIFICO high-strength buckles. 8. The snow-proof cover at the front of the lens sleeve can prevent snow from landing on the lens. 9. The clear see-through pane enables users to frame and monitor the camera screen easily. 10. It comes standard with a storage pouch, easy to storage and carry