Unscrew the cap and you'll find it's attached to an air valve with a 'white' cork stuffed into it, this is the intake air valve. Remove the cork and make sure the air deflate valves on the other side of the mattress are closed.And then use your foot or hand to pump the area around the inflate valve. With each step, you want to make sure that your foot rises over the air inflate valve so the bladder underneath can suck in air with each stroke. 2-3 mins are about how long it should take to inflate. You don't have to fill it up too much, just adjust the firmness to as comfortable as you like. Features: 4" EXTRA THICKNESS FOR ULTIMATE COMFORT - Enjoy superior comfort with our 4-inch thick camping pad. It insulates against rough terrain and cold weather, making it ideal for year-round use. Fully inflated, it measures 74" x 24" x 4", perfect for any outdoor adventure. QUICK EASY INFLATION WITH BUILT-IN PUMP - Inflating is a breeze with our built-in pump?no batteries needed! Simply stomp or hand press. The dual-valve design allows fine-tuning or quick deflation. Compatible with mouth or electric pump if preferred. DURABLE WEATHER-RESISTANT MATERIALS - Made from rugged 75D polyester pongee fabric with PVC lamination, this lightweight pad is waterproof and resilient. Ideal for pairing with tents and sleeping bags, ensuring comfort in harsh outdoor conditions. VERSATILE COMPACT FOR ANY ADVENTURE - Compact and portable, folding to 6" x 6" x 14". Perfect for camping, backpacking, and even floats on water. Snap buttons allow multiple pads to connect, creating a double pad for more space. QUALITY YOU CAN RELY ON - We are committed to providing high-quality products that meet your needs. This sleeping pad is designed for ease of use, durability, and convenience, making it a reliable choice for all your outdoor adventures. PACKAGE INCLUDES 1 x Inflatable Sleeping Pad 1 x Zipper Storage Bag with Repair Patch 1 x Elastic Strap(for better packing) 1 x User Guide Listing and template services provided by inkFrog