Our award-winning Ultra-Sil Day Pack is a minimalist backpack that has incredible strength-to-weight performance and packs down to the size of a tennis ball. The 30D siliconised CORDURAA(R) fabric and reinforcing bar-tacks at stress points enable it to withstand loads many times its own weight. With a 20L capacity, it&';s perfect for a summit pack, carrying groceries when on foot or on a bike, or as an extra traveling tote. The tiny packed size also easily fits onto your key ring, in a jacket pocket or a purse. With non-padded shoulder straps, our maximum load limit recommendation for a comfortable carry is 15 lbs / 7 Kg. FEATURES Ultra-Sil 30D siliconized CORDURAA(R) fabric for strength and durability Reinforced shoulder straps for increased carrying comfort Packs into an attached stuff sack that includes a handy carabiner Packs down small so it easily fits in pockets, purses or luggage Perfect as a lightweight backup or travel bag