Surround 105N High Buoyancy: Pull the cord to quickly inflate the inflatable belt pack, providing 100N of buoyancy. The buoyancy can reach 105N after secondary oral inflation. The surround buoyancy airbag brings even buoyant support without pulling it over your head for easier use. Note: CO2 cylinder not included. Please purchase and install a compatible 24g CO2 cylinder with a 1/2-20UNF threaded inflation valve Stay Comfortable, Breathe Easy: Our manual inflatable belt pack combines security, comfort, and ease of use, avoiding the bulky feel of traditional life jackets. Weighing just 0.82 lbs (0.37 kg), made from waterproof 400D Oxford fabric, it keeps you dry, while the mesh lining on the inside helps you stay cool and fresh even in hot summer weather Customizable to Fit All Body Types: Our inflatable belt waist pack ensures a secure and snug fit for users of various body shapes and sizes. It comfortably fits individuals weighing 80-330 lbs (36-150 kg) with waist sizes ranging from 22.5-59 in (571.5-1498.6 mm). Enjoy a personalized fit for unmatched comfort and security during all your water activities D-Ring for Easy Gear Attachment: Equipped with two movable D-rings, this inflatable belt pack allows you to easily attach essential security items such as a whistle, flashlight, or other rescue gear. Keep your vital equipment within reach, enhancing your security during any water adventure Ideal for Water Activities: This stylish manual inflatable belt pack is suitable for stand-up paddleboarding (SUP), kayaking, fishing, sailing, and recreational rowing. It fits comfortably around your waist, allowing for unrestricted paddling or movement. When not in use, it stores away conveniently and compactly