The Sea to Summit Aeros series of lightweight, inflatable pillows each feature technical fabrics to reduce weight and withstand exposure to moisture. The pillow is easy to inflate, fast to deflate, and can be fined tuned for the right amount of cushion and support thanks to a unique multi-function mini valve. The Aeros Down pillow adds a layer of premium down insulation cushioning for extra comfort and warmth. Unique baffle design reduces migration and compression of down. Packs down to a fraction of its size and includes a handy stuff sack. Ideal for camping, backpacking, plane travel or an inflatable spare bedroom. Aeros pillows are compatible with Sea to Summit sleeping pads designed with PillowLock patches to secure the pillow to the mattress. Regular size 13.4 x 9.4 x 4.7 inches, packs to 3.2 x 2.6 inches and weighs 2.5 ounces; Large size 16.5 x 11 x 4.7 inches, packs to 3.5 x 2.75 inches and weighs 3.4 ounces; Deluxe size 23 x 14.9 x 4.7 inches, packs to 5.5 x 3.2 inches and weighs 6.7 ounces. Sea to Summit products are guaranteed against defects in materials or workmanship for the lifetime of the product.