Yes, BRACERS is a Scrabble word!

Letter values in Scrabble US: B 3, R 1, A 1, C 3, E 1, R 1, S 1.

Is it a valid word?

BRACERS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a protective covering for the wrist or arm that is used in archery and fencing and other sports
a tonic or restorative (especially a drink of liquor)

Also: pick-me-up.

Not playable in Scrabble US: ARMGUARD.