1-just open the mouth of the lounger in the wind to inflate. If the wind is negligible, simply run a few steps with the lounger in hand to inflate. No need for a pump! 2. Superior back support and carefully designed ergonomic headrest provide the best comfort experience. 3. Suitable for many occasions. Perfect for camping, outdoor barbecues, swimming at the beach or pool, backyard fun and many more. 4. The thin, lightweight inflatable lounger is made of high-density water-resistant polyester and built to withstand a wide range of flat surfaces including sand, grass, snow, water, and even gravel. Material: Oxford cloth. Uses: beach, backyard, swimming pool, picnic, camping, party, various outdoor activities, etc. Max Load: 440lbs