M1878 haversack of canvas with canvas strap, brass eyelets, buckle, rings and hooks. Main compartment is 5/8" wide x 11" long and 2 1/2" deep. Three compartments inside the main compartment, two on the sides (2 1/2 x 9) and one flat compartment 8 5/8 x 11 against the back wall. Another flat compartment sewn onto the outside of the main compartment is 10 3/4" x 8 1/2" and fastens at the top with a white metal button and button hole. The haversack flap is sewn at the top to the back of the main compartment and folds over the front. It fastens at the bottom with an 8 1/2" x 3/4" strap with two brass grommets to a brass buckle on the bottom of the haversack. The haversack flap is 13 3/4" x 12 1/4". Sewn onto the back at the two upper corners are two brass "D" rings with hooks.