Arc'teryx Women's Beta Jacket Sea Salt Arctic Silk From The Movie Troll Names Trolls Trolls Trollpedia Fandom. A newer recruit to the Arc'teryx arsenal. The Beta GTX jacket is new to the Beta family; a versatile, multi faceted jacket produced in a 3 layer GORE TEX with GORE's C KNIT backer for next to skin comfort. A low profile single adjustment hood and two voluminous WaterTight hand pockets, with a fully adjustable drawcord hem. Not available for shipping outside of the UK and EU. (Excluding DE)