That would attach to the leg of the astronauts space suit to store vital checklist during launch and reentry. With under the flap on the bag and scissor bag both of whic are stiched to two straps that fasten around the shin with D rings. The interior of bag bears the part number "A7L-201049-01" and two straps used to affix the bag to the space suit. Some stains on the front, and frayng on the straps.

Manufacturer: ILC Industries Inc.

Dimensions: A beta cloth pocket 7" x 10,5" x3"; Scissor bag 8,75" x 3"

Materials: Overall: Beta cloth (Teflon-coated nylon) Tabs: Velcro Snaps: Brass, plastic D-rings: Aluminum 

Spacesuit construction and astronaut preferences meant that pockets to hold scissors, checklists and other small objects needed to be removable, with the possibility of placement elsewhere - on the other leg for example. They were attached to the spacesuit with the use of loops and tapes, and held in place with velcro tabs. (Smithsonian Institute)