EcoGrid Optimist 10L Lightweight Mini Backpack | Flowfold。Like new! An exceptionally lightweight and tough little daypack! Small in stature yet infinitely practical, the Optimist steps up where a full-size bag feels excessive. The perfect backpack for a day of adventures. Crafted from durable, abrasion resistant fabrics, it offers a main compartment and outside stash pocket—both sealed with weather resistant zippers. Specifications: Capacity: 10L Main Compartment: 18\" H x 9.5\" W x 5\" D Outer Pocket: 6.5\" H x 11\" W Weight: 9.7oz / 275g Made in Maine from recycled materials.