Kailas backpack NEW, NEVER USED (with original packaging). Compact design with ample storage space; BI-FIX system prevents water in the flasks from sloshing when half-full; 3D cut; lightweight and breathable fabrics; suitable for long-distance trail running, Gobi Challenge, long-distance running, trekking, marathon; Polygiene® mesh: antibacterial and odor-resistant. Includes 2 x 500 ml flasks.