Simz announced MAHASIMBI with Maharishi in 2025, a creative partnership that merged music, fashion, and cultural symbolism. This collaboration produced bespoke stagewear for Simz's 'Lotus' tour, featuring unique camouflage patterns and embroidered patches representing each track from the album and city visited.

Simz became an ambassador for Vans in 2023, participating in various campaigns and launching her own Slip-On Custom collection. In 2025, she was a key figure in Vans' Premium Old Skool Music Collection campaign, which celebrated the legacy of the iconic Old Skool silhouette in music and skateboarding.