You can find the items by searching for ABIGAIL or Pierisim in game.: Sims 4 CC by pierisim

Pierisim's ABIGAIL Set is a custom content collection featuring a coordinated outfit and matching accessories. The set includes a textured knit sweater with a relaxed, slouchy fit, detailed with subtle ribbing, and a pair of high-waisted, wide-leg trousers with clean, tailored lines. It comes with multiple swatches offering a range of solid and neutral colors, designed to mix and match easily with other wardrobe pieces. The aesthetic is modern, minimalist, and comfortable, perfect for creating everyday cold-weather looks.

This is a standard package file (.package) compatible with all ages of Young Adult through Elder for both masculine and feminine frames. It's an ideal set for players who enjoy building versatile, capsule-wardrobe style outfits for their Sims, focusing on contemporary casual wear. You can find the items by searching for ABIGAIL or Pierisim in game. Sims 4 players should note, as mentioned in the creator's release notes, that this set was published at the very end of September.