Kalais XT specs

Small Medium Large  X Large
Weight: 40.8 oz./1157 g 42.8 oz./1213 g 46.8 oz./1327 g 48.8 oz./1384 g
Max comfortable load (lbs.): 45 lbs.

Volume: Small Medium Large X Large
Main compartment: 2816 in³/46.1 L 3192in³/52.3 L
Front Pocket: 331 in³/5.4 L 441 in³/7.2 L
Bottle Pockets (pair): 442 in³/7.2 L 442 in³/7.2 L
Hip Belt Pockets (pair): 96 in³/1.6 L 96 in³/1.6 L
Total Volume: 3685 in³/60.4 L
4171 in³/68.4 L