Birdies Ultra infused prerolls are potent, straight-roll joints featuring premium greenhouse flower that has been infused with solventless THCA diamonds. They are available in sativa, indica, and hybrid varieties. General characteristics Form: The Ultra infused products are pre-rolled "straight rolls," meaning they are not cone-shaped. Potency: Infused with solventless THCA diamonds for a potent effect. Paper: They use ultra-thin hemp paper. Filter: Each preroll is made with a high-flow filter. Burn: The combination of thin hemp paper and high-flow filters is intended to create a better, smoother burn. Quantity: Available in 5-packs containing 0.85g prerolls, for a total of 4.2g per box. Some varieties are also available in 3-packs.