1.[ONLY 3-4 BREATHS NEEDED]-Inflate or deflate the snorkel vest in seconds, just press down the secure lock valve with slightly force, then inflate the swim vest with your mouth, It only takes 3 breaths to inflate to full capacity. The ergonomic position of valve allows you to adjust vest buoyancy on the fly. 2.[THE IDEAL HOLIDAY COMPANION] -This inflatable life vest is only 0.8lbs and the storage size is 1181 inch(not inflate). Additional mesh bags are provided for easier storage, so it's would not take up your luggage space and it perfect for your summer travel and swimming sports. 3.[WEAR IT LIKE WEAR YOUR CLOTHES]-Thanks to the big & smoothly zippers and sturdy premium materials, this snorkel vest for adults ing a super comfortable experience. The large armhole design is form fitting with dom to move arms in various of water activities. Neck-wrap design could keep your head out of the water. 4.[GIVE YOU MORE CONFIDENCE IN SNORKELLING]-You could adjust the waist belts to fit your body perfectly. The adults/teenagers snorkel vest can be attached to the thighs with the enclosed straps to prevents the buoyancy vest from riding up. It could provides support in dangerous situations such as a current, gives you a feeling when snorkeling.