Aeros Ultralight Pillow Regular by Sea to Summit - ultralight and compact. The Aeros Ultralight Pillow is an ultralight, compact, and comfortable pillow made from soft, brushed recycled material. Its contoured shape fits into the hood of the sleeping bag, while the wavy bottom, along with the included PillowLock system, ensures it stays securely in place all night long. The mini Xpress valve allows for quick inflation, and thanks to the customizable firmness and extra thick height of 11 cm, the pillow provides pleasant support. Made from durable, hydrolysis-resistant TPU, it can be folded down small and is ideal for lightweight adventures.