So Straight - Weft Bundle1 pack of 2 x 50g Wefted Bundles per order A minimum of 2 packs are needed for a full install. Similar to braiding kanekalon hair, our wefted extensions come in packs with 2 half bundles, each weighing 50 grams, giving you greater flexibility in choosing the amount of hair you want to install to ensure a seamless natural look. Depending on your desired fullness and head size, youll need 2 4 packs of hair for a full installation. Our so straight