Ebay offers ASICS Unisex Packable Duffel Bag ZR2722RT for $12.17 (reg $24) with free shipping.

Product Description:
Haul your gear to and from the gym, track or field with our convenient PACKABLE DUFFLE. With just the right amount of space to fit everything you need comfortably and is packable for easy storage when you are on the go.

• Packable
• Reinforces adjustable straps
• Zippered Main Pocket and two Zippered Side Pocket
• 210D Nylon