The closure mechanism on this duffle bag is a zipper. The material of choice for this bag is polyester and it has a 65-litre volume.
From John Lewis & Partners
Osprey Transporter 65 Recycled Holdall
The product is available from £100.88 at international stores.
Trekkinn
Osprey Transporter Backpack 65l Black
This product is also available at 1 unverified merchant.