Pack lighter than ever with the compact ULTRA SIL NANO Backpack by Sea to Summit, amazingly folding up and fitting into the palm of your hand when not in use. The body fabric is rugged and ultralight. It compresses easily into a miniscule pack yet holds up to 20 kilos of gear. An asymmetrical zip compartment helps with packing and provides easy access. Bar tacks along potential stress points make the bag stronger.