Woot offers Hikeback Lightweight Packable Backpack- 24L in Black, Blue, Orange or Green for $14.99 (orig. $45). Free shipping for Prime Members.

Product Description:
Conquer your next outdoor adventure with Hike Back – the ultimate lightweight & compact daypack! Whether you’re hitting the trails or heading to the city, this durable, water-resistant daypack is designed to keep your essentials safe & organized so you can explore with confidence.
Lightweight, compact, and water-resistant, this durable daypack is made of tear-resistant 30D nylon that prevents branches and stones from scratching it. Get ready to explore the great outdoors with Hike Back and never worry about carrying around bulky backpacks again!
Product Details:
•   This lightweight and compact backpack is so slim, it can easily fit into your pocket. It’s perfect for those everyday activities that require a small bag.
•   Don’t worry about the rain ruining your items; it’s made with water-resistant material to keep all of your belongings safe and dry.
•   Durable tear-resistant 30D nylon provides superior protection against scratches and other damages, allowing you to take more with you on any adventure.
•   This multi-functional foldable backpack is ideal for hikes, camping trips, day trips or just everyday shopping. It has plenty of space to store all of
Available in – Black, Orange, Green, Blue
Specifications:

• Dimensions:7.1 x 11.8 x 18.5
• Weight:5 ounces
• Material: 30D Water-proof Nylon
• Capacity: L 24 Liters