Yes, HAIKS is a Scrabble word!

Letter values in Scrabble US: H 4, A 1, I 1, K 5, S 1.

Is it a valid word?

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

an outer garment consisting of a large piece of white cloth; worn by men and women in northern Africa

Not playable in Scrabble US: HAICK.